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Yale New Haven Health is making it easier for people to access the latest medical treatments, advanced research and innovations through our five outstanding hospitals – Yale New Haven, Bridgeport, Greenwich, Lawrence + Memorial and Westerly – and our affiliation with the prestigious Yale University and its highly-ranked Yale School of Medicine. Plus, our patients benefit from access to hundreds of dedicated primary care physicians and specialists in Northeast Medical Group and Yale Medicine. We also have advanced clinical relationships with multiple hospitals and numerous outpatient locations throughout the state so you can get the care you need, when you need it. As one organization, we’re working together to make health care more patient-focused, more accessible and more cost-effective. Some call it personalized medicine. We call it good care. For more information, check out the YNHHS Web site: www.ynhhs.org

Yale New Haven Health A.I CyberSecurity Scoring

YNH

Company Details

Linkedin ID:

yale-new-haven-health-system

Employees number:

5,470

Number of followers:

63,524

NAICS:

62

Industry Type:

Hospitals and Health Care

Homepage:

ynhhs.org

IP Addresses:

0

Company ID:

YAL_2812553

Scan Status:

In-progress

AI scoreYNH Risk Score (AI oriented)

Between 600 and 649

https://images.rankiteo.com/companyimages/yale-new-haven-health-system.jpeg
YNH Hospitals and Health Care
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globalscoreYNH Global Score (TPRM)

XXXX

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YNH Hospitals and Health Care
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YNH Company CyberSecurity News & History

Past Incidents
3
Attack Types
2
EntityTypeSeverityImpactSeenBlog DetailsSupply Chain SourceIncident DetailsView
Yale New Haven HealthCyber Attack60210/2025NA
Rankiteo Explanation :
Attack limited on finance or reputation

Description: Yale New Haven Health experienced a cybersecurity incident over the weekend that disrupted IT services across its health system. The organization identified the issue promptly and engaged Mandiant, a cybersecurity firm, to investigate. While the incident did not compromise patient care, electronic medical records, or the patient portal, it caused intermittent internet and application connectivity problems, leading to delays and operational disruptions. Phone and internet connection issues impacted administrative workflows, requiring teams to rebuild access to critical programs. The organization notified federal authorities and assured staff, patients, and the community that updates would be provided as the situation evolved. The focus remains on restoring full system access while minimizing inconvenience to patients and staff.

Yale New Haven HealthBreach10055/2025NA
Rankiteo Explanation :
Attack threatening the organization’s existence

Description: Yale New Haven Health suffered a massive data breach exposing the protected health information (PHI) of 5,556,702 individuals, making it the largest healthcare data breach of 2025. The incident compromised sensitive patient records, including medical histories, treatment details, and personally identifiable information (PII). Such a breach poses severe risks, including identity theft, medical fraud, and unauthorized disclosure of confidential health data. The scale of the breach suggests a systemic failure in cybersecurity defenses, potentially due to phishing, unpatched vulnerabilities, or third-party vendor compromises. Given the healthcare sector’s regulatory obligations (HIPAA), the breach will likely result in heavy fines, legal repercussions, and long-term reputational damage. Patients may face targeted scams, blackmail, or discriminatory risks if their medical conditions are exposed. The incident also undermines public trust in digital health systems, possibly leading to patient attrition and financial losses from remediation efforts, lawsuits, and regulatory penalties.

Yale New Haven HealthBreach8543/2025NA
Rankiteo Explanation :
Attack with significant impact with customers data leaks

Description: In March, YNHHS experienced a cybersecurity breach where an unauthorized third party accessed patients’ sensitive data, including demographic information, Social Security numbers, patient types, and medical record numbers. While the breach did not compromise electronic medical records, treatment data, or financial accounts, it exposed personally identifiable information (PII) of patients, leading to a class-action lawsuit. YNHHS agreed to an $18 million settlement fund, with $6 million allocated to attorney fees and $12 million for affected individuals offering reimbursements up to $5,000 for documented losses or a flat $100 payment. The breach prompted allegations of inadequate security measures and delayed patient notifications. Despite denying liability, YNHHS committed to enhancing cybersecurity protocols to prevent future incidents. The settlement also includes injunctive relief mandating improved data security practices. The breach impacted thousands of patients, risking identity theft and reputational harm to the health system.

Yale New Haven Health
Cyber Attack
Severity: 60
Impact: 2
Seen: 10/2025
Blog:
Supply Chain Source: NA
Rankiteo Explanation
Attack limited on finance or reputation

Description: Yale New Haven Health experienced a cybersecurity incident over the weekend that disrupted IT services across its health system. The organization identified the issue promptly and engaged Mandiant, a cybersecurity firm, to investigate. While the incident did not compromise patient care, electronic medical records, or the patient portal, it caused intermittent internet and application connectivity problems, leading to delays and operational disruptions. Phone and internet connection issues impacted administrative workflows, requiring teams to rebuild access to critical programs. The organization notified federal authorities and assured staff, patients, and the community that updates would be provided as the situation evolved. The focus remains on restoring full system access while minimizing inconvenience to patients and staff.

Yale New Haven Health
Breach
Severity: 100
Impact: 5
Seen: 5/2025
Blog:
Supply Chain Source: NA
Rankiteo Explanation
Attack threatening the organization’s existence

Description: Yale New Haven Health suffered a massive data breach exposing the protected health information (PHI) of 5,556,702 individuals, making it the largest healthcare data breach of 2025. The incident compromised sensitive patient records, including medical histories, treatment details, and personally identifiable information (PII). Such a breach poses severe risks, including identity theft, medical fraud, and unauthorized disclosure of confidential health data. The scale of the breach suggests a systemic failure in cybersecurity defenses, potentially due to phishing, unpatched vulnerabilities, or third-party vendor compromises. Given the healthcare sector’s regulatory obligations (HIPAA), the breach will likely result in heavy fines, legal repercussions, and long-term reputational damage. Patients may face targeted scams, blackmail, or discriminatory risks if their medical conditions are exposed. The incident also undermines public trust in digital health systems, possibly leading to patient attrition and financial losses from remediation efforts, lawsuits, and regulatory penalties.

Yale New Haven Health System (YNHHS)
Breach
Severity: 85
Impact: 4
Seen: 3/2025
Blog:
Supply Chain Source: NA
Rankiteo Explanation
Attack with significant impact with customers data leaks

Description: In March, YNHHS experienced a cybersecurity breach where an unauthorized third party accessed patients’ sensitive data, including demographic information, Social Security numbers, patient types, and medical record numbers. While the breach did not compromise electronic medical records, treatment data, or financial accounts, it exposed personally identifiable information (PII) of patients, leading to a class-action lawsuit. YNHHS agreed to an $18 million settlement fund, with $6 million allocated to attorney fees and $12 million for affected individuals offering reimbursements up to $5,000 for documented losses or a flat $100 payment. The breach prompted allegations of inadequate security measures and delayed patient notifications. Despite denying liability, YNHHS committed to enhancing cybersecurity protocols to prevent future incidents. The settlement also includes injunctive relief mandating improved data security practices. The breach impacted thousands of patients, risking identity theft and reputational harm to the health system.

Ailogo

YNH Company Scoring based on AI Models

Cyber Incidents Likelihood 3 - 6 - 9 months

🔒
Incident Predictions locked
Access Monitoring Plan

A.I Risk Score Likelihood 3 - 6 - 9 months

🔒
A.I. Risk Score Predictions locked
Access Monitoring Plan
statics

Underwriter Stats for YNH

Incidents vs Hospitals and Health Care Industry Average (This Year)

No incidents recorded for Yale New Haven Health in 2026.

Incidents vs All-Companies Average (This Year)

No incidents recorded for Yale New Haven Health in 2026.

Incident Types YNH vs Hospitals and Health Care Industry Avg (This Year)

No incidents recorded for Yale New Haven Health in 2026.

Incident History — YNH (X = Date, Y = Severity)

YNH cyber incidents detection timeline including parent company and subsidiaries

YNH Company Subsidiaries

SubsidiaryImage

Yale New Haven Health is making it easier for people to access the latest medical treatments, advanced research and innovations through our five outstanding hospitals – Yale New Haven, Bridgeport, Greenwich, Lawrence + Memorial and Westerly – and our affiliation with the prestigious Yale University and its highly-ranked Yale School of Medicine. Plus, our patients benefit from access to hundreds of dedicated primary care physicians and specialists in Northeast Medical Group and Yale Medicine. We also have advanced clinical relationships with multiple hospitals and numerous outpatient locations throughout the state so you can get the care you need, when you need it. As one organization, we’re working together to make health care more patient-focused, more accessible and more cost-effective. Some call it personalized medicine. We call it good care. For more information, check out the YNHHS Web site: www.ynhhs.org

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newsone

YNH CyberSecurity News

January 19, 2026 06:20 AM
Yale New Haven Health System to sue Prospect Medical Holdings

On Friday, Yale New Haven Health System filed a complaint against Prospect Medical Holdings to avoid acquiring three Connecticut hospitals.

January 02, 2026 08:00 AM
Largest Healthcare Data Breaches of 2025

It has been another bad year for healthcare data breaches, although the breach report data currently show a considerable improvement over...

December 31, 2025 08:00 AM
Cybersecurity 2025: Major breaches, data leaks and lessons

No matter how big or small a business is, everyone is vulnerable to a cyberattack or data breach. Hackers and cybercriminals devise new...

December 09, 2025 08:00 AM
More than 100 provider groups tell HHS to pull proposed HIPAA update

The cybersecurity and privacy regulation update proposed in January would place "extreme and unnecessary regulatory burden" on providers.

October 31, 2025 07:00 AM
Yale New Haven Health confirms data breach impacting 5.5 million individuals, largest healthcare incident of 2025

Yale New Haven Health has disclosed a data security incident that compromised the protected health information of up to 5556702 individuals,...

October 30, 2025 07:00 AM
YNHHS reaches preliminary $18 million settlement over data breach

After a March cybersecurity breach that allowed an unauthorized third party to access patients' information, the Yale New Haven Health...

October 22, 2025 07:00 AM
Hearing Scheduled for Yale New Haven Data Breach in March

BRIDGEPORT – A hearing on the final approval of an $18 million settlement by the parent company of Yale New Haven Hospital and four other...

September 30, 2025 07:00 AM
Yale New Haven to pay Prospect $45M to end hospital acquisition dispute

With the agreement, the health system has officially gotten out of its 2022 deal to acquire Prospect Medical Holdings' three...

September 12, 2025 07:00 AM
Yale New Haven Health to Pay $18M in Data Breach Settlement

NEW HAVEN — The parent company of Yale New Haven Hospital and four other hospitals in Connecticut and Rhode Island has agreed to pay $18...

faq

Frequently Asked Questions

Explore insights on cybersecurity incidents, risk posture, and Rankiteo's assessments.

YNH CyberSecurity History Information

Official Website of Yale New Haven Health

The official website of Yale New Haven Health is http://www.ynhhs.org.

Yale New Haven Health’s AI-Generated Cybersecurity Score

According to Rankiteo, Yale New Haven Health’s AI-generated cybersecurity score is 602, reflecting their Poor security posture.

How many security badges does Yale New Haven Health’ have ?

According to Rankiteo, Yale New Haven Health currently holds 0 security badges, indicating that no recognized compliance certifications are currently verified for the organization.

Has Yale New Haven Health been affected by any supply chain cyber incidents ?

According to Rankiteo, Yale New Haven Health has not been affected by any supply chain cyber incidents, and no incident IDs are currently listed for the organization.

Does Yale New Haven Health have SOC 2 Type 1 certification ?

According to Rankiteo, Yale New Haven Health is not certified under SOC 2 Type 1.

Does Yale New Haven Health have SOC 2 Type 2 certification ?

According to Rankiteo, Yale New Haven Health does not hold a SOC 2 Type 2 certification.

Does Yale New Haven Health comply with GDPR ?

According to Rankiteo, Yale New Haven Health is not listed as GDPR compliant.

Does Yale New Haven Health have PCI DSS certification ?

According to Rankiteo, Yale New Haven Health does not currently maintain PCI DSS compliance.

Does Yale New Haven Health comply with HIPAA ?

According to Rankiteo, Yale New Haven Health is not compliant with HIPAA regulations.

Does Yale New Haven Health have ISO 27001 certification ?

According to Rankiteo,Yale New Haven Health is not certified under ISO 27001, indicating the absence of a formally recognized information security management framework.

Industry Classification of Yale New Haven Health

Yale New Haven Health operates primarily in the Hospitals and Health Care industry.

Number of Employees at Yale New Haven Health

Yale New Haven Health employs approximately 5,470 people worldwide.

Subsidiaries Owned by Yale New Haven Health

Yale New Haven Health presently has no subsidiaries across any sectors.

Yale New Haven Health’s LinkedIn Followers

Yale New Haven Health’s official LinkedIn profile has approximately 63,524 followers.

NAICS Classification of Yale New Haven Health

Yale New Haven Health is classified under the NAICS code 62, which corresponds to Health Care and Social Assistance.

Yale New Haven Health’s Presence on Crunchbase

No, Yale New Haven Health does not have a profile on Crunchbase.

Yale New Haven Health’s Presence on LinkedIn

Yes, Yale New Haven Health maintains an official LinkedIn profile, which is actively utilized for branding and talent engagement, which can be accessed here: https://www.linkedin.com/company/yale-new-haven-health-system.

Cybersecurity Incidents Involving Yale New Haven Health

As of January 23, 2026, Rankiteo reports that Yale New Haven Health has experienced 3 cybersecurity incidents.

Number of Peer and Competitor Companies

Yale New Haven Health has an estimated 31,602 peer or competitor companies worldwide.

What types of cybersecurity incidents have occurred at Yale New Haven Health ?

Incident Types: The types of cybersecurity incidents that have occurred include Cyber Attack and Breach.

What was the total financial impact of these incidents on Yale New Haven Health ?

Total Financial Loss: The total financial loss from these incidents is estimated to be $18 million.

How does Yale New Haven Health detect and respond to cybersecurity incidents ?

Detection and Response: The company detects and responds to cybersecurity incidents through an third party assistance with mandiant (cybersecurity firm), and and containment measures with mitigation efforts by digital and technology solutions team, and remediation measures with rebuilding access to programs, and recovery measures with restoring full system access, and communication strategy with public statement, communication strategy with updates to staff and patients as appropriate, and incident response plan activated with yes (quick identification and containment), and containment measures with unspecified (successful containment per ynhhs statement), and communication strategy with public statement (2023-04-11), communication strategy with detailed explanation (2023-04-11), communication strategy with settlement announcement (2024-09-10), and enhanced monitoring with committed to strengthening data security measures post-breach, and communication strategy with public disclosure..

Incident Details

Can you provide details on each incident ?

Incident : IT service disruption

Title: Cybersecurity Incident at Yale New Haven Health Affecting IT Services

Description: Yale New Haven Health is investigating a cybersecurity incident over the weekend that disrupted IT services across its health system. The incident caused intermittent internet and application connectivity issues, though patient care, the patient portal, and electronic medical records remained unaffected. The organization is working with Mandiant to investigate and has notified federal authorities. Phone and internet connection issues have impacted patient care operations, and teams are actively rebuilding access to affected programs.

Date Detected: 2023-10-14T00:00:00Z

Date Publicly Disclosed: 2023-10-16T00:00:00Z

Type: IT service disruption

Incident : Data Breach

Title: Yale New Haven Health System Data Breach (March 2023)

Description: An unauthorized third party accessed patients’ information in a cybersecurity breach at Yale New Haven Health System (YNHHS). The breach exposed demographic data, Social Security numbers, patient type, and medical record numbers, though electronic medical records and financial/payment information were not compromised. YNHHS agreed to an $18 million settlement fund, including $6 million for attorney fees and $2,500 service awards for class representatives. Affected individuals may claim up to $5,000 for documented losses or a $100 cash payment. The settlement also mandates enhanced data security measures. YNHHS denied liability but settled to avoid prolonged litigation.

Date Detected: 2023-03

Date Publicly Disclosed: 2023-04-11

Type: Data Breach

Threat Actor: Unauthorized third party

Incident : Data Breach

Title: Yale New Haven Health Data Breach (2025)

Description: Yale New Haven Health has disclosed a data security incident that compromised the protected health information of up to 5,556,702 individuals, marking the largest healthcare data breach reported in 2025.

Type: Data Breach

What are the most common types of attacks the company has faced ?

Common Attack Types: The most common types of attacks the company has faced is Breach.

Impact of the Incidents

What was the impact of each incident ?

Incident : IT service disruption YAL0952809102725

Systems Affected: IT servicesinternet connectivityapplication accessphone systems

Downtime: intermittent (ongoing as of disclosure)

Operational Impact: phone and internet connection delayslimited access to certain programs

Brand Reputation Impact: potential (due to service delays)

Incident : Data Breach YAL0932109103125

Financial Loss: $18 million (settlement fund, including $6 million for attorney fees)

Data Compromised: Demographic information, Social security numbers, Patient type, Medical record numbers

Operational Impact: None (uninterrupted patient care maintained)

Customer Complaints: Class action lawsuit filed (2023-04-16)

Brand Reputation Impact: Negative (lawsuit, public disclosure of breach)

Legal Liabilities: $18 million settlement (preliminary approval 2024, final hearing scheduled for 2026-03-03)

Identity Theft Risk: High (Social Security numbers exposed)

Payment Information Risk: None (no financial/payment data accessed)

Incident : Data Breach YAL0632206103125

Data Compromised: Protected health information (phi)

Brand Reputation Impact: High (largest healthcare breach of 2025)

Identity Theft Risk: High (PHI exposed)

What is the average financial loss per incident ?

Average Financial Loss: The average financial loss per incident is $6.00 million.

What types of data are most commonly compromised in incidents ?

Commonly Compromised Data Types: The types of data most commonly compromised in incidents are Demographic Information, Social Security Numbers, Patient Type, Medical Record Numbers, , Protected Health Information (Phi) and .

Which entities were affected by each incident ?

Incident : IT service disruption YAL0952809102725

Entity Name: Yale New Haven Health

Entity Type: healthcare system

Industry: healthcare

Location: Connecticut, USA

Incident : Data Breach YAL0932109103125

Entity Name: Yale New Haven Health System (YNHHS)

Entity Type: Healthcare System

Industry: Healthcare

Location: Bridgeport, Connecticut, USA

Size: 12,000+ employees; 4,500 university/community physicians

Incident : Data Breach YAL0632206103125

Entity Name: Yale New Haven Health

Entity Type: Healthcare Provider

Industry: Healthcare

Location: New Haven, Connecticut, USA

Customers Affected: 5,556,702 individuals

Response to the Incidents

What measures were taken in response to each incident ?

Incident : IT service disruption YAL0952809102725

Incident Response Plan Activated: True

Third Party Assistance: Mandiant (Cybersecurity Firm).

Containment Measures: mitigation efforts by digital and technology solutions team

Remediation Measures: rebuilding access to programs

Recovery Measures: restoring full system access

Communication Strategy: public statementupdates to staff and patients as appropriate

Incident : Data Breach YAL0932109103125

Incident Response Plan Activated: Yes (quick identification and containment)

Containment Measures: Unspecified (successful containment per YNHHS statement)

Communication Strategy: Public statement (2023-04-11)Detailed explanation (2023-04-11)Settlement announcement (2024-09-10)

Enhanced Monitoring: Committed to strengthening data security measures post-breach

Incident : Data Breach YAL0632206103125

Communication Strategy: Public disclosure

What is the company's incident response plan?

Incident Response Plan: The company's incident response plan is described as Yes (quick identification and containment).

How does the company involve third-party assistance in incident response ?

Third-Party Assistance: The company involves third-party assistance in incident response through Mandiant (cybersecurity firm), .

Data Breach Information

What type of data was compromised in each breach ?

Incident : Data Breach YAL0932109103125

Type of Data Compromised: Demographic information, Social security numbers, Patient type, Medical record numbers

Sensitivity of Data: High (PII, including SSNs)

Data Exfiltration: Yes

Personally Identifiable Information: Yes (Social Security numbers, medical record numbers)

Incident : Data Breach YAL0632206103125

Type of Data Compromised: Protected health information (phi)

Number of Records Exposed: 5,556,702

Sensitivity of Data: High

Personally Identifiable Information: Yes (PHI includes PII)

What measures does the company take to prevent data exfiltration ?

Prevention of Data Exfiltration: The company takes the following measures to prevent data exfiltration: rebuilding access to programs, .

How does the company handle incidents involving personally identifiable information (PII) ?

Handling of PII Incidents: The company handles incidents involving personally identifiable information (PII) through by mitigation efforts by digital and technology solutions team, and unspecified (successful containment per ynhhs statement).

Ransomware Information

How does the company recover data encrypted by ransomware ?

Data Recovery from Ransomware: The company recovers data encrypted by ransomware through restoring full system access, .

Regulatory Compliance

Were there any regulatory violations and fines imposed for each incident ?

Incident : IT service disruption YAL0952809102725

Regulatory Notifications: federal authorities (unspecified)

Incident : Data Breach YAL0932109103125

Legal Actions: Class action lawsuit (filed 2023-04-16), Settlement agreement (preliminary approval 2024-09-10),

Incident : Data Breach YAL0632206103125

Regulations Violated: HIPAA (likely),

How does the company ensure compliance with regulatory requirements ?

Ensuring Regulatory Compliance: The company ensures compliance with regulatory requirements through Class action lawsuit (filed 2023-04-16), Settlement agreement (preliminary approval 2024-09-10), .

Lessons Learned and Recommendations

What lessons were learned from each incident ?

Incident : Data Breach YAL0932109103125

Lessons Learned: Importance of timely patient notification and adherence to industry-standard data security protocols to prevent and detect cyberattacks.

What recommendations were made to prevent future incidents ?

Incident : Data Breach YAL0932109103125

Recommendations: Enhance cybersecurity protocols beyond industry best practices, Implement faster breach notification processes, Regularly update and audit data security measuresEnhance cybersecurity protocols beyond industry best practices, Implement faster breach notification processes, Regularly update and audit data security measuresEnhance cybersecurity protocols beyond industry best practices, Implement faster breach notification processes, Regularly update and audit data security measures

What are the key lessons learned from past incidents ?

Key Lessons Learned: The key lessons learned from past incidents are Importance of timely patient notification and adherence to industry-standard data security protocols to prevent and detect cyberattacks.

What recommendations has the company implemented to improve cybersecurity ?

Implemented Recommendations: The company has implemented the following recommendations to improve cybersecurity: Implement faster breach notification processes, Regularly update and audit data security measures and Enhance cybersecurity protocols beyond industry best practices.

References

Where can I find more information about each incident ?

Incident : IT service disruption YAL0952809102725

Source: Stream Connecticut News

Date Accessed: 2023-10-16T00:00:00Z

Incident : Data Breach YAL0932109103125

Source: Yale Daily News

Incident : Data Breach YAL0932109103125

Source: YNHHS Public Statement (2023-04-11)

Incident : Data Breach YAL0932109103125

Source: Class Action Lawsuit Settlement (filed 2024-09-10)

Where can stakeholders find additional resources on cybersecurity best practices ?

Additional Resources: Stakeholders can find additional resources on cybersecurity best practices at and Source: Stream Connecticut NewsDate Accessed: 2023-10-16T00:00:00Z, and Source: Yale Daily News, and Source: YNHHS Public Statement (2023-04-11), and Source: Class Action Lawsuit Settlement (filed 2024-09-10).

Investigation Status

What is the current status of the investigation for each incident ?

Incident : IT service disruption YAL0952809102725

Investigation Status: ongoing (with Mandiant)

Incident : Data Breach YAL0932109103125

Investigation Status: Ongoing (settlement pending final approval on 2026-03-03)

Incident : Data Breach YAL0632206103125

Investigation Status: Disclosed (ongoing or completed not specified)

How does the company communicate the status of incident investigations to stakeholders ?

Communication of Investigation Status: The company communicates the status of incident investigations to stakeholders through Public Statement, Updates To Staff And Patients As Appropriate, Public Statement (2023-04-11), Detailed Explanation (2023-04-11), Settlement Announcement (2024-09-10) and Public disclosure.

Stakeholder and Customer Advisories

Were there any advisories issued to stakeholders or customers for each incident ?

Incident : IT service disruption YAL0952809102725

Stakeholder Advisories: Public Apology For Inconvenience, Request For Patience From Staff, Patients, And Community.

Customer Advisories: updates provided to patients as appropriate

Incident : Data Breach YAL0932109103125

Stakeholder Advisories: Settlement notices sent to affected patients; claim filing deadline: 2026-01-19

Customer Advisories: Reimbursement up to $5,000 for documented lossesCash payment option (~$100)

Incident : Data Breach YAL0632206103125

Customer Advisories: Public notification of breach

What advisories does the company provide to stakeholders and customers following an incident ?

Advisories Provided: The company provides the following advisories to stakeholders and customers following an incident: were Public Apology For Inconvenience, Request For Patience From Staff, Patients, And Community, Updates Provided To Patients As Appropriate, , Settlement notices sent to affected patients; claim filing deadline: 2026-01-19, Reimbursement Up To $5,000 For Documented Losses, Cash Payment Option (~$100), and Public notification of breach.

Initial Access Broker

How did the initial access broker gain entry for each incident ?

Incident : Data Breach YAL0932109103125

High Value Targets: Patient Demographic Data, Social Security Numbers,

Data Sold on Dark Web: Patient Demographic Data, Social Security Numbers,

Post-Incident Analysis

What were the root causes and corrective actions taken for each incident ?

Incident : Data Breach YAL0932109103125

Root Causes: Alleged Failure To Implement Industry-Standard Data Security Protocols (Per Lawsuit), Delayed Patient Notification (Per Lawsuit),

Corrective Actions: $18 Million Settlement Fund, Enhanced Data Security Measures (As Part Of Injunctive Relief), Continuous System Updates To Prevent Future Breaches,

What is the company's process for conducting post-incident analysis ?

Post-Incident Analysis Process: The company's process for conducting post-incident analysis is described as Mandiant (Cybersecurity Firm), , Committed to strengthening data security measures post-breach.

What corrective actions has the company taken based on post-incident analysis ?

Corrective Actions Taken: The company has taken the following corrective actions based on post-incident analysis: $18 Million Settlement Fund, Enhanced Data Security Measures (As Part Of Injunctive Relief), Continuous System Updates To Prevent Future Breaches, .

Additional Questions

General Information

Who was the attacking group in the last incident ?

Last Attacking Group: The attacking group in the last incident was an Unauthorized third party.

Incident Details

What was the most recent incident detected ?

Most Recent Incident Detected: The most recent incident detected was on 2023-10-14T00:00:00Z.

What was the most recent incident publicly disclosed ?

Most Recent Incident Publicly Disclosed: The most recent incident publicly disclosed was on 2023-04-11.

Impact of the Incidents

What was the highest financial loss from an incident ?

Highest Financial Loss: The highest financial loss from an incident was $18 million (settlement fund, including $6 million for attorney fees).

What was the most significant data compromised in an incident ?

Most Significant Data Compromised: The most significant data compromised in an incident were Demographic information, Social Security numbers, Patient type, Medical record numbers, , Protected Health Information (PHI) and .

What was the most significant system affected in an incident ?

Most Significant System Affected: The most significant system affected in an incident was IT servicesinternet connectivityapplication accessphone systems.

Response to the Incidents

What third-party assistance was involved in the most recent incident ?

Third-Party Assistance in Most Recent Incident: The third-party assistance involved in the most recent incident was mandiant (cybersecurity firm), .

What containment measures were taken in the most recent incident ?

Containment Measures in Most Recent Incident: The containment measures taken in the most recent incident were mitigation efforts by digital and technology solutions team and Unspecified (successful containment per YNHHS statement).

Data Breach Information

What was the most sensitive data compromised in a breach ?

Most Sensitive Data Compromised: The most sensitive data compromised in a breach were Social Security numbers, Patient type, Demographic information, Medical record numbers and Protected Health Information (PHI).

What was the number of records exposed in the most significant breach ?

Number of Records Exposed in Most Significant Breach: The number of records exposed in the most significant breach was 5.6M.

Regulatory Compliance

What was the most significant legal action taken for a regulatory violation ?

Most Significant Legal Action: The most significant legal action taken for a regulatory violation was Class action lawsuit (filed 2023-04-16), Settlement agreement (preliminary approval 2024-09-10), .

Lessons Learned and Recommendations

What was the most significant lesson learned from past incidents ?

Most Significant Lesson Learned: The most significant lesson learned from past incidents was Importance of timely patient notification and adherence to industry-standard data security protocols to prevent and detect cyberattacks.

What was the most significant recommendation implemented to improve cybersecurity ?

Most Significant Recommendation Implemented: The most significant recommendation implemented to improve cybersecurity was Implement faster breach notification processes, Regularly update and audit data security measures and Enhance cybersecurity protocols beyond industry best practices.

References

What is the most recent source of information about an incident ?

Most Recent Source: The most recent source of information about an incident are Stream Connecticut News, Class Action Lawsuit Settlement (filed 2024-09-10), YNHHS Public Statement (2023-04-11) and Yale Daily News.

Investigation Status

What is the current status of the most recent investigation ?

Current Status of Most Recent Investigation: The current status of the most recent investigation is ongoing (with Mandiant).

Stakeholder and Customer Advisories

What was the most recent stakeholder advisory issued ?

Most Recent Stakeholder Advisory: The most recent stakeholder advisory issued was public apology for inconvenience, request for patience from staff, patients, and community, Settlement notices sent to affected patients; claim filing deadline: 2026-01-19, .

What was the most recent customer advisory issued ?

Most Recent Customer Advisory: The most recent customer advisory issued were an updates provided to patients as appropriate, Reimbursement up to $5,000 for documented lossesCash payment option (~$100) and Public notification of breach.

cve

Latest Global CVEs (Not Company-Specific)

Description

Improper validation of specified type of input in M365 Copilot allows an unauthorized attacker to disclose information over a network.

Risk Information
cvss3
Base: 9.3
Severity: LOW
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
Description

Improper access control in Azure Front Door (AFD) allows an unauthorized attacker to elevate privileges over a network.

Risk Information
cvss3
Base: 9.8
Severity: LOW
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Description

Azure Entra ID Elevation of Privilege Vulnerability

Risk Information
cvss3
Base: 9.3
Severity: LOW
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
Description

Moonraker is a Python web server providing API access to Klipper 3D printing firmware. In versions 0.9.3 and below, instances configured with the "ldap" component enabled are vulnerable to LDAP search filter injection techniques via the login endpoint. The 401 error response message can be used to determine whether or not a search was successful, allowing for brute force methods to discover LDAP entries on the server such as user IDs and user attributes. This issue has been fixed in version 0.10.0.

Risk Information
cvss4
Base: 2.7
Severity: LOW
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Description

Runtipi is a Docker-based, personal homeserver orchestrator that facilitates multiple services on a single server. Versions 3.7.0 and above allow an authenticated user to execute arbitrary system commands on the host server by injecting shell metacharacters into backup filenames. The BackupManager fails to sanitize the filenames of uploaded backups. The system persists user-uploaded files directly to the host filesystem using the raw originalname provided in the request. This allows an attacker to stage a file containing shell metacharacters (e.g., $(id).tar.gz) at a predictable path, which is later referenced during the restore process. The successful storage of the file is what allows the subsequent restore command to reference and execute it. This issue has been fixed in version 4.7.0.

Risk Information
cvss3
Base: 8.0
Severity: HIGH
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

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Digital Assets

Every week, Rankiteo analyzes billions of signals to give organizations a sharper, faster view of emerging risks. With deeper, more actionable intelligence at their fingertips, security teams can outpace threat actors, respond instantly to Zero-Day attacks, and dramatically shrink their risk exposure window.

These are some of the factors we use to calculate the overall score:

Network Security

Identify exposed access points, detect misconfigured SSL certificates, and uncover vulnerabilities across the network infrastructure.

SBOM (Software Bill of Materials)

Gain visibility into the software components used within an organization to detect vulnerabilities, manage risk, and ensure supply chain security.

CMDB (Configuration Management Database)

Monitor and manage all IT assets and their configurations to ensure accurate, real-time visibility across the company's technology environment.

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Leverage real-time insights on active threats, malware campaigns, and emerging vulnerabilities to proactively defend against evolving cyberattacks.

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