Company Details
michigan-medicine
14,206
106,875
62
uofmhealth.org
149
MIC_1147334
Completed

Michigan Medicine Company CyberSecurity Posture
uofmhealth.orgMichigan Medicine, based in Ann Arbor, Michigan, is part of one of the world’s leading universities. Michigan Medicine is a premier, highly ranked academic medical center and award-winning health care system with state-of-the-art facilities. Our vision is to create the future of health care through scientific discovery, innovations in education, and the most effective and compassionate care. We want to be the leader in health care, health care reform, and biomedical innovation. Michigan Medicine includes the U-M Hospitals and Health Centers; the U-M Medical School and its Faculty Group Practice; one of the nation's largest biomedical research communities; and education programs that train thousands of future health professionals and scientists each year. We were formerly known as the University of Michigan Medical Center; today that term applies generally to the collection of buildings on our main medical campus in Ann Arbor. We have a close partnership with the U-M School of Nursing and other health sciences schools at U-M. Through the Michigan Health Corporation, we are able to form partnerships outside of our University.
Company Details
michigan-medicine
14,206
106,875
62
uofmhealth.org
149
MIC_1147334
Completed
Between 700 and 749

Michigan Medicine Global Score (TPRM)XXXX

Description: The patient information of Michigan Medicine was leaked in a data security incident after an employee email account was compromised. A newly-hired employee accessed patients' electronic medical records of about 2,920 patients without any business need. The compromised information included demographic and clinical information such as diagnosis, treatment, and test results. The employee's excess was immediately cut off and further investigation revealed that no information was misused and the employee checked the records out of curiosity.
Description: On November 10, 2022, the Vermont Office of the Attorney General reported a data breach involving Michigan Medicine that occurred from August 15 to August 23, 2022, due to a phishing attack targeting its employees. The breach potentially exposed identifiable patient information, including names, medical record numbers, addresses, dates of birth, and health insurance information; however, the specific number of individuals affected is unknown.
Description: Michigan Medicine was targeted in a cyber attack after that experienced intermittent problems with its public websites as a result on a third-party vendor they used to host some of their sites. They worked with the third-party to mitigate it and expect to have sites fully functional as soon as possible. Public websites hosted by a third-party provider are the only websites that have been targeted. All patient information is secure and not included on any of the compromised sites. Michigan Medicine took steps immediately to investigate the matter and implemented additional safeguards to reduce risk to our patients.
Description: Michigan Medicine was targeted in a cyber attack that lured employees to a webpage that got them to enter their login information. Four Michigan Medicine employees entered login information and accepted multifactor authentication prompts which gave attackers to access their email accounts and resulted in a breach. The incident compromised the patients' names, addresses, birth dates, treatment information, medical record numbers, and health insurance information of about 33,850 patients. Michigan Medicine took steps immediately to investigate the matter and implemented additional safeguards to reduce risk to our patients.
Description: Michigan Medicine notified approximately 5,500 patients about a phishing email campaign that have exposed some of their health information. During the campaign, emails containing a malicious link were sent to over 3,200 Michigan Medicine employees. This email was opened by three employees, giving the attacker access to their email accounts. The compromised information includes names, medical record numbers, addresses, dates of birth, diagnostic and treatment information, and health insurance information. As soon as Michigan Medicine learned that the email accounts were compromised, they were disabled so no further access could take place until the passwords were changed.


No incidents recorded for Michigan Medicine in 2025.
No incidents recorded for Michigan Medicine in 2025.
No incidents recorded for Michigan Medicine in 2025.
Michigan Medicine cyber incidents detection timeline including parent company and subsidiaries

Michigan Medicine, based in Ann Arbor, Michigan, is part of one of the world’s leading universities. Michigan Medicine is a premier, highly ranked academic medical center and award-winning health care system with state-of-the-art facilities. Our vision is to create the future of health care through scientific discovery, innovations in education, and the most effective and compassionate care. We want to be the leader in health care, health care reform, and biomedical innovation. Michigan Medicine includes the U-M Hospitals and Health Centers; the U-M Medical School and its Faculty Group Practice; one of the nation's largest biomedical research communities; and education programs that train thousands of future health professionals and scientists each year. We were formerly known as the University of Michigan Medical Center; today that term applies generally to the collection of buildings on our main medical campus in Ann Arbor. We have a close partnership with the U-M School of Nursing and other health sciences schools at U-M. Through the Michigan Health Corporation, we are able to form partnerships outside of our University.


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Explore insights on cybersecurity incidents, risk posture, and Rankiteo's assessments.
The official website of Michigan Medicine is http://www.uofmhealth.org.
According to Rankiteo, Michigan Medicine’s AI-generated cybersecurity score is 700, reflecting their Moderate security posture.
According to Rankiteo, Michigan Medicine currently holds 0 security badges, indicating that no recognized compliance certifications are currently verified for the organization.
According to Rankiteo, Michigan Medicine is not certified under SOC 2 Type 1.
According to Rankiteo, Michigan Medicine does not hold a SOC 2 Type 2 certification.
According to Rankiteo, Michigan Medicine is not listed as GDPR compliant.
According to Rankiteo, Michigan Medicine does not currently maintain PCI DSS compliance.
According to Rankiteo, Michigan Medicine is not compliant with HIPAA regulations.
According to Rankiteo,Michigan Medicine is not certified under ISO 27001, indicating the absence of a formally recognized information security management framework.
Michigan Medicine operates primarily in the Hospitals and Health Care industry.
Michigan Medicine employs approximately 14,206 people worldwide.
Michigan Medicine presently has no subsidiaries across any sectors.
Michigan Medicine’s official LinkedIn profile has approximately 106,875 followers.
Michigan Medicine is classified under the NAICS code 62, which corresponds to Health Care and Social Assistance.
No, Michigan Medicine does not have a profile on Crunchbase.
Yes, Michigan Medicine maintains an official LinkedIn profile, which is actively utilized for branding and talent engagement, which can be accessed here: https://www.linkedin.com/company/michigan-medicine.
As of November 27, 2025, Rankiteo reports that Michigan Medicine has experienced 5 cybersecurity incidents.
Michigan Medicine has an estimated 29,962 peer or competitor companies worldwide.
Incident Types: The types of cybersecurity incidents that have occurred include Breach, Data Leak and Cyber Attack.
Detection and Response: The company detects and responds to cybersecurity incidents through an containment measures with employee's access was immediately cut off, and and remediation measures with implemented additional safeguards, and containment measures with disabled compromised email accounts, containment measures with changed passwords..
Title: Michigan Medicine Data Security Incident
Description: The patient information of Michigan Medicine was leaked in a data security incident after an employee email account was compromised. A newly-hired employee accessed patients' electronic medical records of about 2,920 patients without any business need. The compromised information included demographic and clinical information such as diagnosis, treatment, and test results. The employee's excess was immediately cut off and further investigation revealed that no information was misused and the employee checked the records out of curiosity.
Type: Data Breach
Attack Vector: Compromised Email Account
Threat Actor: Internal Employee
Motivation: Curiosity
Title: Michigan Medicine Cyber Attack
Description: Michigan Medicine was targeted in a cyber attack that lured employees to a webpage that got them to enter their login information. Four Michigan Medicine employees entered login information and accepted multifactor authentication prompts which gave attackers access to their email accounts and resulted in a breach. The incident compromised the patients' names, addresses, birth dates, treatment information, medical record numbers, and health insurance information of about 33,850 patients. Michigan Medicine took steps immediately to investigate the matter and implemented additional safeguards to reduce risk to our patients.
Type: Data Breach
Attack Vector: Phishing
Vulnerability Exploited: Human Error
Title: Cyber Attack on Michigan Medicine
Description: Michigan Medicine experienced intermittent problems with its public websites due to a cyber attack on a third-party vendor hosting some of their sites. The websites were targeted, but patient information remained secure and was not compromised.
Type: Cyber Attack
Attack Vector: Third-party vendor compromise
Title: Phishing Email Campaign at Michigan Medicine
Description: Michigan Medicine notified approximately 5,500 patients about a phishing email campaign that exposed some of their health information. Emails containing a malicious link were sent to over 3,200 Michigan Medicine employees, and three employees opened the email, giving the attacker access to their email accounts.
Type: Phishing
Attack Vector: Email
Vulnerability Exploited: Human
Title: Michigan Medicine Data Breach
Description: A data breach at Michigan Medicine occurred from August 15 to August 23, 2022, due to a phishing attack targeting its employees. The breach potentially exposed identifiable patient information, including names, medical record numbers, addresses, dates of birth, and health insurance information.
Date Detected: 2022-08-23
Date Publicly Disclosed: 2022-11-10
Type: Data Breach
Attack Vector: Phishing
Vulnerability Exploited: Human
Common Attack Types: The most common types of attacks the company has faced is Breach.
Identification of Attack Vectors: The company identifies the attack vectors used in incidents through Compromised Email Account, Email and Phishing email.

Data Compromised: Demographic information, Clinical information

Data Compromised: Names, Addresses, Birth dates, Treatment information, Medical record numbers, Health insurance information
Systems Affected: Email Accounts

Systems Affected: Public websites hosted by a third-party provider
Operational Impact: Intermittent problems with public websites

Data Compromised: Names, Medical record numbers, Addresses, Dates of birth, Diagnostic and treatment information, Health insurance information

Data Compromised: Names, Medical record numbers, Addresses, Dates of birth, Health insurance information
Commonly Compromised Data Types: The types of data most commonly compromised in incidents are Demographic Information, Clinical Information, , Personally Identifiable Information, Health Information, , Names, Medical Record Numbers, Addresses, Dates Of Birth, Diagnostic And Treatment Information, Health Insurance Information, , Names, Medical Record Numbers, Addresses, Dates Of Birth, Health Insurance Information and .

Entity Name: Michigan Medicine
Entity Type: Healthcare
Industry: Healthcare
Location: Michigan
Customers Affected: 2920

Entity Name: Michigan Medicine
Entity Type: Healthcare Provider
Industry: Healthcare
Location: Michigan
Customers Affected: 33850

Entity Name: Michigan Medicine
Entity Type: Healthcare
Industry: Healthcare
Location: Michigan, USA

Entity Name: Michigan Medicine
Entity Type: Healthcare
Industry: Healthcare
Customers Affected: 5500

Entity Name: Michigan Medicine
Entity Type: Healthcare
Industry: Healthcare
Location: Michigan

Containment Measures: Employee's access was immediately cut off

Remediation Measures: Implemented additional safeguards

Containment Measures: Disabled compromised email accountsChanged passwords

Type of Data Compromised: Demographic information, Clinical information
Number of Records Exposed: 2920
Sensitivity of Data: High
Personally Identifiable Information: Demographic Information

Type of Data Compromised: Personally identifiable information, Health information
Number of Records Exposed: 33850
Sensitivity of Data: High
Personally Identifiable Information: NamesAddressesBirth DatesMedical Record NumbersHealth Insurance Information

Type of Data Compromised: Names, Medical record numbers, Addresses, Dates of birth, Diagnostic and treatment information, Health insurance information
Number of Records Exposed: 5500
Sensitivity of Data: High

Type of Data Compromised: Names, Medical record numbers, Addresses, Dates of birth, Health insurance information
Sensitivity of Data: High
Prevention of Data Exfiltration: The company takes the following measures to prevent data exfiltration: Implemented additional safeguards, .
Handling of PII Incidents: The company handles incidents involving personally identifiable information (PII) through by employee's access was immediately cut off, disabled compromised email accounts, changed passwords and .

Source: Vermont Office of the Attorney General
Date Accessed: 2022-11-10
Additional Resources: Stakeholders can find additional resources on cybersecurity best practices at and Source: Vermont Office of the Attorney GeneralDate Accessed: 2022-11-10.

Investigation Status: Resolved

Entry Point: Compromised Email Account

Entry Point: Email

Entry Point: Phishing email

Root Causes: Internal Employee Curiosity

Root Causes: Phishing attack targeting employees
Last Attacking Group: The attacking group in the last incident was an Internal Employee.
Most Recent Incident Detected: The most recent incident detected was on 2022-08-23.
Most Recent Incident Publicly Disclosed: The most recent incident publicly disclosed was on 2022-11-10.
Most Significant Data Compromised: The most significant data compromised in an incident were Demographic Information, Clinical Information, , Names, Addresses, Birth Dates, Treatment Information, Medical Record Numbers, Health Insurance Information, , Names, Medical record numbers, Addresses, Dates of birth, Diagnostic and treatment information, Health insurance information, , names, medical record numbers, addresses, dates of birth, health insurance information and .
Most Significant System Affected: The most significant system affected in an incident was Email Accounts and Public websites hosted by a third-party provider.
Containment Measures in Most Recent Incident: The containment measures taken in the most recent incident were Employee's access was immediately cut off and Disabled compromised email accountsChanged passwords.
Most Sensitive Data Compromised: The most sensitive data compromised in a breach were Medical Record Numbers, Names, names, dates of birth, Addresses, Medical record numbers, Clinical Information, Birth Dates, medical record numbers, Dates of birth, health insurance information, Diagnostic and treatment information, Treatment Information, addresses, Health insurance information, Demographic Information and Health Insurance Information.
Number of Records Exposed in Most Significant Breach: The number of records exposed in the most significant breach was 1.2K.
Most Recent Source: The most recent source of information about an incident is Vermont Office of the Attorney General.
Current Status of Most Recent Investigation: The current status of the most recent investigation is Resolved.
Most Recent Entry Point: The most recent entry point used by an initial access broker were an Phishing email, Compromised Email Account and Email.
Most Significant Root Cause: The most significant root cause identified in post-incident analysis was Internal Employee Curiosity, Phishing attack targeting employees.
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Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to versions 19.2.16, 20.3.14, and 21.0.1, there is a XSRF token leakage via protocol-relative URLs in angular HTTP clients. The vulnerability is a Credential Leak by App Logic that leads to the unauthorized disclosure of the Cross-Site Request Forgery (XSRF) token to an attacker-controlled domain. Angular's HttpClient has a built-in XSRF protection mechanism that works by checking if a request URL starts with a protocol (http:// or https://) to determine if it is cross-origin. If the URL starts with protocol-relative URL (//), it is incorrectly treated as a same-origin request, and the XSRF token is automatically added to the X-XSRF-TOKEN header. This issue has been patched in versions 19.2.16, 20.3.14, and 21.0.1. A workaround for this issue involves avoiding using protocol-relative URLs (URLs starting with //) in HttpClient requests. All backend communication URLs should be hardcoded as relative paths (starting with a single /) or fully qualified, trusted absolute URLs.
Forge (also called `node-forge`) is a native implementation of Transport Layer Security in JavaScript. An Uncontrolled Recursion vulnerability in node-forge versions 1.3.1 and below enables remote, unauthenticated attackers to craft deep ASN.1 structures that trigger unbounded recursive parsing. This leads to a Denial-of-Service (DoS) via stack exhaustion when parsing untrusted DER inputs. This issue has been patched in version 1.3.2.
Forge (also called `node-forge`) is a native implementation of Transport Layer Security in JavaScript. An Integer Overflow vulnerability in node-forge versions 1.3.1 and below enables remote, unauthenticated attackers to craft ASN.1 structures containing OIDs with oversized arcs. These arcs may be decoded as smaller, trusted OIDs due to 32-bit bitwise truncation, enabling the bypass of downstream OID-based security decisions. This issue has been patched in version 1.3.2.
Suricata is a network IDS, IPS and NSM engine developed by the OISF (Open Information Security Foundation) and the Suricata community. Prior to versions 7.0.13 and 8.0.2, working with large buffers in Lua scripts can lead to a stack overflow. Users of Lua rules and output scripts may be affected when working with large buffers. This includes a rule passing a large buffer to a Lua script. This issue has been patched in versions 7.0.13 and 8.0.2. A workaround for this issue involves disabling Lua rules and output scripts, or making sure limits, such as stream.depth.reassembly and HTTP response body limits (response-body-limit), are set to less than half the stack size.
Suricata is a network IDS, IPS and NSM engine developed by the OISF (Open Information Security Foundation) and the Suricata community. In versions from 8.0.0 to before 8.0.2, a NULL dereference can occur when the entropy keyword is used in conjunction with base64_data. This issue has been patched in version 8.0.2. A workaround involves disabling rules that use entropy in conjunction with base64_data.

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