Company Details
gallagher-global
43,519
587,599
524
linktr.ee
0
GAL_7156214
In-progress

Gallagher Company CyberSecurity Posture
linktr.eeGallagher, a global insurance brokerage, risk management, and consulting firm, serves communities around the globe, helping clients address risk, protecting assets, and recovering from losses. The products and services we provide keep businesses and institutions running, and enable individuals and families to face their future with confidence. Gallagher provides retail and wholesale property and casualty brokerage, alternative risk transfer services, employee benefit consulting, and actuarial services. Gallagher also offers claims and information management, risk control consulting and appraisal services, human resource consulting, and retirement services. Follow us on social: Instagram: http://instagram.com/gallagherglobal Facebook: http://www.facebook.com/GallagherGlobal Twitter: https://twitter.com/GallagherGlobal YouTube: https://www.youtube.com/GallagherGlobal
Company Details
gallagher-global
43,519
587,599
524
linktr.ee
0
GAL_7156214
In-progress
Between 750 and 799

Gallagher Global Score (TPRM)XXXX

Description: The California Office of the Attorney General reported a data breach involving Gallagher Bassett Services, Inc. on August 3, 2018. The breach potentially affected approximately 1,294 claimants whose information may have been accessed by an unauthorized individual impersonating a licensed physician, potentially exposing names, Social Security numbers, medical information, and health insurance information.
Description: The California Office of the Attorney General disclosed a **data breach** affecting **Arthur J. Gallagher & Co.** on **December 6, 2019**, though the incident itself occurred earlier on **March 15, 2019**. The breach notification lacked critical specifics, including the **number of impacted individuals** and the **types of compromised data**. Given the absence of explicit details, the nature of the breach suggests potential exposure of sensitive information—possibly including **employee or customer records**, financial data, or proprietary corporate details—though the exact scope remains unverified.The delayed disclosure (nearly **nine months** after the breach) raises concerns about transparency and incident response protocols. Without confirmation of stolen data or malicious exploitation, the breach’s immediate consequences appear limited to **reputational harm** and regulatory scrutiny. However, the lack of clarity on affected data categories (e.g., personal identifiers, financial records, or internal documents) leaves uncertainties about long-term risks, such as **identity theft, fraud, or compliance violations**.As a global insurance brokerage and risk management firm, Arthur J. Gallagher & Co. handles vast volumes of sensitive client and employee data, making such breaches particularly critical. The incident underscores the need for robust cybersecurity measures and timely breach notifications to mitigate potential fallout.
Description: The Maine Office of the Attorney General reported a data breach at Arthur J. Gallagher & Co. between June 3, 2020, and September 26, 2020, due to a hacking incident. The breach affected 5,577 individuals, including 2 Maine residents. The compromised information included Social Security numbers.
Description: US-based global insurance brokerage and risk management firm Arthur J. Gallagher suffered a data breach after a ransomware attack on its systems. The compromised information includes Social Security number, driver's license, passport or other government identification number, date of birth, username and password, employee identification number, financial account, and other personal information of its clients. The company has informed impacted customers about the breach and has asked them to be alert about any suspicious activity.
Description: The Maine Office of the Attorney General reported a data breach involving Arthur J. Gallagher & Co. on June 30, 2021. The breach was detected on September 26, 2020, and it involved unauthorized access to internal systems, affecting approximately 7,376 individuals, including 12 Maine residents. The compromised data included personal information such as Social Security numbers and financial account details, and the company offered 24 months of identity theft protection services through Kroll.


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

Gallagher, a global insurance brokerage, risk management, and consulting firm, serves communities around the globe, helping clients address risk, protecting assets, and recovering from losses. The products and services we provide keep businesses and institutions running, and enable individuals and families to face their future with confidence. Gallagher provides retail and wholesale property and casualty brokerage, alternative risk transfer services, employee benefit consulting, and actuarial services. Gallagher also offers claims and information management, risk control consulting and appraisal services, human resource consulting, and retirement services. Follow us on social: Instagram: http://instagram.com/gallagherglobal Facebook: http://www.facebook.com/GallagherGlobal Twitter: https://twitter.com/GallagherGlobal YouTube: https://www.youtube.com/GallagherGlobal


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Explore insights on cybersecurity incidents, risk posture, and Rankiteo's assessments.
The official website of Gallagher is https://linktr.ee/GallagherGlobal.
According to Rankiteo, Gallagher’s AI-generated cybersecurity score is 763, reflecting their Fair security posture.
According to Rankiteo, Gallagher currently holds 0 security badges, indicating that no recognized compliance certifications are currently verified for the organization.
According to Rankiteo, Gallagher is not certified under SOC 2 Type 1.
According to Rankiteo, Gallagher does not hold a SOC 2 Type 2 certification.
According to Rankiteo, Gallagher is not listed as GDPR compliant.
According to Rankiteo, Gallagher does not currently maintain PCI DSS compliance.
According to Rankiteo, Gallagher is not compliant with HIPAA regulations.
According to Rankiteo,Gallagher is not certified under ISO 27001, indicating the absence of a formally recognized information security management framework.
Gallagher operates primarily in the Insurance industry.
Gallagher employs approximately 43,519 people worldwide.
Gallagher presently has no subsidiaries across any sectors.
Gallagher’s official LinkedIn profile has approximately 587,599 followers.
Gallagher is classified under the NAICS code 524, which corresponds to Insurance Carriers and Related Activities.
Yes, Gallagher has an official profile on Crunchbase, which can be accessed here: https://www.crunchbase.com/organization/arthur-j-gallagher-co.
Yes, Gallagher maintains an official LinkedIn profile, which is actively utilized for branding and talent engagement, which can be accessed here: https://www.linkedin.com/company/gallagher-global.
As of November 27, 2025, Rankiteo reports that Gallagher has experienced 5 cybersecurity incidents.
Gallagher has an estimated 14,863 peer or competitor companies worldwide.
Incident Types: The types of cybersecurity incidents that have occurred include Breach.
Detection and Response: The company detects and responds to cybersecurity incidents through an communication strategy with the company has informed impacted customers about the breach and has asked them to be alert about any suspicious activity., and third party assistance with kroll..
Title: Arthur J. Gallagher Data Breach
Description: US-based global insurance brokerage and risk management firm Arthur J. Gallagher suffered a data breach after a ransomware attack on its systems. The compromised information includes Social Security number, driver's license, passport or other government identification number, date of birth, username and password, employee identification number, financial account, and other personal information of its clients. The company has informed impacted customers about the breach and has asked them to be alert about any suspicious activity.
Type: Data Breach
Attack Vector: Ransomware
Title: Arthur J. Gallagher & Co. Data Breach
Description: The Maine Office of the Attorney General reported that Arthur J. Gallagher & Co. experienced a data breach impacting between June 3, 2020 and September 26, 2020, involving a hacking incident. The breach affected 5,577 individuals in total, with 2 Maine residents specifically notified. The compromised information included Social Security numbers.
Type: Data Breach
Attack Vector: Hacking
Title: Data Breach at Arthur J. Gallagher & Co.
Description: Unauthorized access to internal systems compromising personal information including Social Security numbers and financial account details.
Date Detected: 2020-09-26
Date Publicly Disclosed: 2021-06-30
Type: Data Breach
Attack Vector: Unauthorized Access
Title: Data Breach at Gallagher Bassett Services, Inc.
Description: The California Office of the Attorney General reported a data breach involving Gallagher Bassett Services, Inc. on August 3, 2018. The breach potentially affected approximately 1,294 claimants whose information may have been accessed by an unauthorized individual impersonating a licensed physician, potentially exposing names, Social Security numbers, medical information, and health insurance information.
Date Detected: 2018-08-03
Date Publicly Disclosed: 2018-08-03
Type: Data Breach
Attack Vector: Impersonation
Threat Actor: Unauthorized Individual
Title: Data Breach at Arthur J. Gallagher & Co.
Description: The California Office of the Attorney General reported a data breach involving Arthur J. Gallagher & Co. on December 6, 2019. The breach occurred on March 15, 2019, but specific details regarding the number of affected individuals and types of information compromised are unknown.
Date Publicly Disclosed: 2019-12-06
Type: Data Breach
Common Attack Types: The most common types of attacks the company has faced is Breach.

Data Compromised: Social security number, Driver's license, Passport or other government identification number, Date of birth, Username and password, Employee identification number, Financial account, Other personal information

Data Compromised: Social security numbers

Data Compromised: Social security numbers, Financial account details

Data Compromised: Names, Social security numbers, Medical information, Health insurance information
Commonly Compromised Data Types: The types of data most commonly compromised in incidents are Social Security Number, Driver'S License, Passport Or Other Government Identification Number, Date Of Birth, Username And Password, Employee Identification Number, Financial Account, Other Personal Information, , Social Security Numbers, , Social Security Numbers, Financial Account Details, , Names, Social Security Numbers, Medical Information, Health Insurance Information and .

Entity Name: Arthur J. Gallagher
Entity Type: Company
Industry: Insurance and Risk Management
Location: United States

Entity Name: Arthur J. Gallagher & Co.
Entity Type: Company
Customers Affected: 5577

Entity Name: Arthur J. Gallagher & Co.
Entity Type: Company
Industry: Insurance
Customers Affected: 7376

Entity Name: Gallagher Bassett Services, Inc.
Entity Type: Company
Industry: Insurance
Location: California
Customers Affected: 1294

Entity Name: Arthur J. Gallagher & Co.
Entity Type: Company
Industry: Insurance, Risk Management, and Consulting
Location: United States (Headquarters in Rolling Meadows, Illinois)

Communication Strategy: The company has informed impacted customers about the breach and has asked them to be alert about any suspicious activity.

Third Party Assistance: Kroll
Third-Party Assistance: The company involves third-party assistance in incident response through Kroll.

Type of Data Compromised: Social security number, Driver's license, Passport or other government identification number, Date of birth, Username and password, Employee identification number, Financial account, Other personal information
Sensitivity of Data: High

Type of Data Compromised: Social security numbers
Number of Records Exposed: 5577

Type of Data Compromised: Social security numbers, Financial account details
Number of Records Exposed: 7376
Sensitivity of Data: High

Type of Data Compromised: Names, Social security numbers, Medical information, Health insurance information
Number of Records Exposed: 1294
Sensitivity of Data: High

Regulatory Notifications: authority: California Office of the Attorney General, date: 2019-12-06

Source: Maine Office of the Attorney General

Source: Maine Office of the Attorney General
Date Accessed: 2021-06-30

Source: California Office of the Attorney General
Date Accessed: 2018-08-03

Source: California Office of the Attorney General
Date Accessed: 2019-12-06
Additional Resources: Stakeholders can find additional resources on cybersecurity best practices at and Source: Maine Office of the Attorney General, and Source: Maine Office of the Attorney GeneralDate Accessed: 2021-06-30, and Source: California Office of the Attorney GeneralDate Accessed: 2018-08-03, and Source: California Office of the Attorney GeneralDate Accessed: 2019-12-06.
Communication of Investigation Status: The company communicates the status of incident investigations to stakeholders through The company has informed impacted customers about the breach and has asked them to be alert about any suspicious activity..

Customer Advisories: The company has informed impacted customers about the breach and has asked them to be alert about any suspicious activity.
Advisories Provided: The company provides the following advisories to stakeholders and customers following an incident: was The company has informed impacted customers about the breach and has asked them to be alert about any suspicious activity..
Post-Incident Analysis Process: The company's process for conducting post-incident analysis is described as Kroll.
Last Attacking Group: The attacking group in the last incident was an Unauthorized Individual.
Most Recent Incident Detected: The most recent incident detected was on 2020-09-26.
Most Recent Incident Publicly Disclosed: The most recent incident publicly disclosed was on 2019-12-06.
Most Significant Data Compromised: The most significant data compromised in an incident were Social Security number, driver's license, passport or other government identification number, date of birth, username and password, employee identification number, financial account, other personal information, , Social Security numbers, , Social Security numbers, financial account details, , Names, Social Security numbers, Medical information, Health insurance information and .
Third-Party Assistance in Most Recent Incident: The third-party assistance involved in the most recent incident was Kroll.
Most Sensitive Data Compromised: The most sensitive data compromised in a breach were other personal information, date of birth, Social Security numbers, Names, Social Security number, financial account, driver's license, Health insurance information, employee identification number, username and password, Medical information, passport or other government identification number and financial account details.
Number of Records Exposed in Most Significant Breach: The number of records exposed in the most significant breach was 1.4K.
Most Recent Source: The most recent source of information about an incident are Maine Office of the Attorney General and California Office of the Attorney General.
Most Recent Customer Advisory: The most recent customer advisory issued was an The company has informed impacted customers about the breach and has asked them to be alert about any suspicious activity.
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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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