MassMutual Company CyberSecurity Posture
https://www.MassMutual.com
Living mutual has always been at the core of our human existence, and it's the principle that's guided us since our founding in 1851. It's not a concept we invented, but one we champion for the simple reason that people take it for granted today. While the world would have us strive for independence, the truth is when we depend on one another, we aren't just more secure - life is happier and more fulfilling. So as we celebrate our new identity, we're reminding everyone that who we are stays the same. Learn more at: www.MassMutual.com Disclosures about MassMutual’s LinkedIn Company Page and other social media sites are located at: https://www.massmutual.com/social-media-guidelines. CRN201905-212768
Company Details
massmutual-financial-group
12,846
131,868
52
https://www.MassMutual.com
0
MAS_2948633
In-progress
MassMutual Risk Score (AI oriented)Between 600 and 649
MassMutual Global Score (TPRM)XXXX
Description: The California Office of the Attorney General reported a data breach involving Massachusetts Mutual Life Insurance Company (MassMutual) on October 4, 2013. The breach occurred on September 13, 2013, and involved the potential exposure of personal information, including names, dates of birth, and Social Security numbers, due to a damaged mailing by the United States Postal Service (USPS).
Description: The Massachusetts Office of Consumer Affairs and Business Regulation reported a data breach involving Massachusetts Mutual Life Insurance Company (MassMutual) on April 26, 2024. The breach affected 309 residents, compromising Social Security Numbers (SSN) and medical records.
Description: The California Office of the Attorney General reported a data breach involving Massachusetts Mutual Life Insurance Company (MassMutual) on June 4, 2013. The breach occurred on May 8, 2013, due to an inadvertent disclosure of personal identifying information, including names and Social Security numbers, to a non-affiliated third party, affecting an unspecified number of individuals.
Description: The California Office of the Attorney General reported that Massachusetts Mutual Life Insurance Company (MassMutual) experienced a data breach involving unauthorized access to an employee's online account on February 1, 2023. Notification was made on April 27, 2023, but the number of affected individuals and specific types of personal information exposed are currently unknown.
Description: Massachusetts Mutual Life Insurance Company suffered a data breach after an unauthorized party gained access to sensitive consumer information that had been entrusted to the company. The breach exposed the names, addresses, Social Security numbers, driver’s license numbers, state identification numbers, and financial account information belonging to certain individuals including 1,472 Texas residents. The attack might have affected a large number of U.S. citizens as MassMutual does business throughout the country. However, the company sent the breach notice to the affected parties.
Description: On July 19, 2023, the Maine Attorney General's Office reported a data breach involving Massachusetts Mutual Life Company (MassMutual) that affected two Maine residents. The breach occurred on May 29 and May 30, 2023, when a threat actor exploited a zero-day vulnerability in Pension Benefit Information, LLC's MOVEit Transfer software, potentially exposing names, partial mailing addresses, Social Security numbers, and dates of birth of the affected individuals.
Description: On December 16, 2013, the California Office of the Attorney General reported a data breach involving Massachusetts Mutual Life Insurance Company (MassMutual) that occurred on December 3, 2013. The breach involved the inadvertent disclosure of personal identifying information, including names, addresses, dates of birth, Social Security numbers, and retirement plan details of individuals. Affected individuals were offered a two-year subscription to Equifax Credit Watch for monitoring personal and credit information.
Description: On August 29, 2017, the California Office of the Attorney General reported a data breach involving Massachusetts Mutual Life Insurance Company (MassMutual) which occurred on August 17, 2017. The breach involved unauthorized access to nonpublic personally identifiable information (PII) of clients as a result of social engineering tactics exploiting the access credentials of two insurance agents. The total number of individuals affected is currently unknown.
Description: The California Office of the Attorney General reported that Massachusetts Mutual Life Insurance Company experienced a data breach involving the mailing of IRS Form 1099 to incorrect addresses on January 30, 2013. The breach affected customer information, including names, addresses, Social Security Numbers, and financial details, but it is unknown how many individuals were affected.
Description: The California Office of the Attorney General reported that Massachusetts Mutual Life Insurance Company experienced a data breach on July 13, 2012. The breach involved the inadvertent exposure of customer names, Social Security numbers, and 401(k) balance information. This incident was reported on July 31, 2012.
No incidents recorded for MassMutual in 2025.
No incidents recorded for MassMutual in 2025.
No incidents recorded for MassMutual in 2025.
MassMutual cyber incidents detection timeline including parent company and subsidiaries
Living mutual has always been at the core of our human existence, and it's the principle that's guided us since our founding in 1851. It's not a concept we invented, but one we champion for the simple reason that people take it for granted today. While the world would have us strive for independence, the truth is when we depend on one another, we aren't just more secure - life is happier and more fulfilling. So as we celebrate our new identity, we're reminding everyone that who we are stays the same. Learn more at: www.MassMutual.com Disclosures about MassMutual’s LinkedIn Company Page and other social media sites are located at: https://www.massmutual.com/social-media-guidelines. CRN201905-212768
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Explore insights on cybersecurity incidents, risk posture, and Rankiteo's assessments.
The official website of MassMutual is https://www.MassMutual.com.
According to Rankiteo, MassMutual’s AI-generated cybersecurity score is 601, reflecting their Poor security posture.
According to Rankiteo, MassMutual currently holds 0 security badges, indicating that no recognized compliance certifications are currently verified for the organization.
According to Rankiteo, MassMutual is not certified under SOC 2 Type 1.
According to Rankiteo, MassMutual does not hold a SOC 2 Type 2 certification.
According to Rankiteo, MassMutual is not listed as GDPR compliant.
According to Rankiteo, MassMutual does not currently maintain PCI DSS compliance.
According to Rankiteo, MassMutual is not compliant with HIPAA regulations.
According to Rankiteo,MassMutual is not certified under ISO 27001, indicating the absence of a formally recognized information security management framework.
MassMutual operates primarily in the Financial Services industry.
MassMutual employs approximately 12,846 people worldwide.
MassMutual presently has no subsidiaries across any sectors.
MassMutual’s official LinkedIn profile has approximately 131,868 followers.
MassMutual is classified under the NAICS code 52, which corresponds to Finance and Insurance.
No, MassMutual does not have a profile on Crunchbase.
Yes, MassMutual maintains an official LinkedIn profile, which is actively utilized for branding and talent engagement, which can be accessed here: https://www.linkedin.com/company/massmutual-financial-group.
As of November 27, 2025, Rankiteo reports that MassMutual has experienced 10 cybersecurity incidents.
MassMutual has an estimated 29,517 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 breach notice sent to affected parties..
Title: MassMutual Data Breach
Description: Massachusetts Mutual Life Insurance Company suffered a data breach after an unauthorized party gained access to sensitive consumer information.
Type: Data Breach
Title: Data Breach at Massachusetts Mutual Life Insurance Company
Description: The Massachusetts Office of Consumer Affairs and Business Regulation reported a data breach involving Massachusetts Mutual Life Insurance Company (MassMutual) on April 26, 2024. The breach affected 309 residents, compromising Social Security Numbers (SSN) and medical records.
Date Publicly Disclosed: 2024-04-26
Type: Data Breach
Title: MassMutual Data Breach
Description: Unauthorized access to nonpublic personally identifiable information (PII) of clients as a result of social engineering tactics exploiting the access credentials of two insurance agents.
Date Detected: 2017-08-29
Date Publicly Disclosed: 2017-08-29
Type: Data Breach
Attack Vector: Social Engineering
Vulnerability Exploited: Access Credentials
Title: MassMutual Data Breach
Description: A data breach involving Massachusetts Mutual Life Company (MassMutual) that affected two Maine residents. The breach occurred when a threat actor exploited a zero-day vulnerability in Pension Benefit Information, LLC's MOVEit Transfer software.
Date Detected: 2023-07-19
Date Publicly Disclosed: 2023-07-19
Type: Data Breach
Attack Vector: Zero-day vulnerability exploitation
Vulnerability Exploited: MOVEit Transfer software
Title: MassMutual Data Breach
Description: Unauthorized access to an employee's online account at Massachusetts Mutual Life Insurance Company (MassMutual).
Date Detected: 2023-02-01
Date Publicly Disclosed: 2023-04-27
Type: Data Breach
Attack Vector: Unauthorized Access
Title: MassMutual Data Breach
Description: Inadvertent disclosure of personal identifying information including names, addresses, dates of birth, Social Security numbers, and retirement plan details.
Date Detected: 2013-12-03
Date Publicly Disclosed: 2013-12-16
Type: Data Breach
Attack Vector: Inadvertent Disclosure
Title: MassMutual Data Breach
Description: The California Office of the Attorney General reported a data breach involving Massachusetts Mutual Life Insurance Company (MassMutual) on June 4, 2013. The breach occurred on May 8, 2013, due to an inadvertent disclosure of personal identifying information, including names and Social Security numbers, to a non-affiliated third party, affecting an unspecified number of individuals.
Date Detected: 2013-05-08
Date Publicly Disclosed: 2013-06-04
Type: Data Breach
Attack Vector: Inadvertent Disclosure
Title: MassMutual Data Breach
Description: The California Office of the Attorney General reported a data breach involving Massachusetts Mutual Life Insurance Company (MassMutual) on October 4, 2013. The breach occurred on September 13, 2013, and involved the potential exposure of personal information, including names, dates of birth, and Social Security numbers, due to a damaged mailing by the United States Postal Service (USPS).
Date Detected: 2013-09-13
Date Publicly Disclosed: 2013-10-04
Type: Data Breach
Attack Vector: Physical
Vulnerability Exploited: Damaged mailing
Threat Actor: United States Postal Service (USPS)
Title: Massachusetts Mutual Life Insurance Company Data Breach
Description: The California Office of the Attorney General reported that Massachusetts Mutual Life Insurance Company experienced a data breach on July 13, 2012, involving the inadvertent exposure of customer names, Social Security numbers, and 401(k) balance information. The breach was reported on July 31, 2012.
Date Detected: 2012-07-13
Date Publicly Disclosed: 2012-07-31
Type: Data Breach
Title: Massachusetts Mutual Life Insurance Company Data Breach
Description: The California Office of the Attorney General reported that Massachusetts Mutual Life Insurance Company experienced a data breach involving the mailing of IRS Form 1099 to incorrect addresses on January 30, 2013. The breach affected customer information, including names, addresses, Social Security Numbers, and financial details, but it is unknown how many individuals were affected.
Date Detected: 2013-01-30
Type: Data Breach
Attack Vector: Mailing Error
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 Access Credentials and MOVEit Transfer software.
Data Compromised: Names, Addresses, Social security numbers, Driver’s license numbers, State identification numbers, Financial account information
Data Compromised: Social security numbers (ssn), Medical records
Data Compromised: PII
Data Compromised: Names, Partial mailing addresses, Social security numbers, Dates of birth
Data Compromised: Names, Addresses, Dates of birth, Social security numbers, Retirement plan details
Data Compromised: Names, Social security numbers
Data Compromised: Names, Dates of birth, Social security numbers
Data Compromised: Customer names, Social security numbers, 401(k) balance information
Data Compromised: Names, Addresses, Social security numbers, Financial details
Commonly Compromised Data Types: The types of data most commonly compromised in incidents are Pii, Financial Information, , Social Security Numbers (Ssn), Medical Records, , PII, Names, Partial Mailing Addresses, Social Security Numbers, Dates Of Birth, , Personal Identifying Information, , Names, Social Security Numbers, , Names, Dates Of Birth, Social Security Numbers, , Customer Names, Social Security Numbers, 401(K) Balance Information, , Names, Addresses, Social Security Numbers, Financial Details and .
Entity Name: Massachusetts Mutual Life Insurance Company
Entity Type: Corporation
Industry: Insurance
Location: United States
Customers Affected: 1472
Entity Name: Massachusetts Mutual Life Insurance Company
Entity Type: Insurance Company
Industry: Insurance
Location: Massachusetts
Customers Affected: 309
Entity Name: Massachusetts Mutual Life Insurance Company (MassMutual)
Entity Type: Insurance Company
Industry: Insurance
Location: Massachusetts
Entity Name: Massachusetts Mutual Life Company (MassMutual)
Entity Type: Insurance Company
Industry: Financial Services
Location: Massachusetts
Customers Affected: 2
Entity Name: Massachusetts Mutual Life Insurance Company (MassMutual)
Entity Type: Insurance Company
Industry: Insurance
Location: Massachusetts
Entity Name: Massachusetts Mutual Life Insurance Company (MassMutual)
Entity Type: Insurance Company
Industry: Financial Services
Location: Massachusetts
Entity Name: Massachusetts Mutual Life Insurance Company (MassMutual)
Entity Type: Insurance Company
Industry: Insurance
Location: Massachusetts
Entity Name: Massachusetts Mutual Life Insurance Company (MassMutual)
Entity Type: Insurance Company
Industry: Insurance
Location: Massachusetts
Entity Name: Massachusetts Mutual Life Insurance Company
Entity Type: Insurance Company
Industry: Financial Services
Location: Massachusetts
Entity Name: Massachusetts Mutual Life Insurance Company
Entity Type: Insurance Company
Industry: Insurance
Location: Massachusetts
Communication Strategy: Breach notice sent to affected parties
Type of Data Compromised: Pii, Financial information
Number of Records Exposed: 1472
Sensitivity of Data: High
Personally Identifiable Information: namesaddressesSocial Security numbersdriver’s license numbersstate identification numbers
Type of Data Compromised: Social security numbers (ssn), Medical records
Number of Records Exposed: 309
Sensitivity of Data: High
Type of Data Compromised: PII
Personally Identifiable Information: Nonpublic PII
Type of Data Compromised: Names, Partial mailing addresses, Social security numbers, Dates of birth
Number of Records Exposed: 2
Sensitivity of Data: High
Type of Data Compromised: Personal identifying information
Sensitivity of Data: High
Personally Identifiable Information: namesaddressesdates of birthSocial Security numbers
Type of Data Compromised: Names, Social security numbers
Sensitivity of Data: High
Type of Data Compromised: Names, Dates of birth, Social security numbers
Sensitivity of Data: High
Type of Data Compromised: Customer names, Social security numbers, 401(k) balance information
Sensitivity of Data: High
Type of Data Compromised: Names, Addresses, Social security numbers, Financial details
Sensitivity of Data: High
Source: Massachusetts Office of Consumer Affairs and Business Regulation
Source: California Office of the Attorney General
Date Accessed: 2017-08-29
Source: California Office of the Attorney General
Source: California Office of the Attorney General
Date Accessed: 2013-12-16
Source: California Office of the Attorney General
Source: California Office of the Attorney General
Date Accessed: 2013-10-04
Source: California Office of the Attorney General
Date Accessed: 2012-07-31
Source: California Office of the Attorney General
Additional Resources: Stakeholders can find additional resources on cybersecurity best practices at and Source: Massachusetts Office of Consumer Affairs and Business Regulation, and Source: California Office of the Attorney GeneralDate Accessed: 2017-08-29, and Source: Maine Attorney General's OfficeDate Accessed: 2023-07-19, and Source: California Office of the Attorney General, and Source: California Office of the Attorney GeneralDate Accessed: 2013-12-16, and Source: California Office of the Attorney General, and Source: California Office of the Attorney GeneralDate Accessed: 2013-10-04, and Source: California Office of the Attorney GeneralDate Accessed: 2012-07-31, and Source: California Office of the Attorney General.
Communication of Investigation Status: The company communicates the status of incident investigations to stakeholders through Breach notice sent to affected parties.
Customer Advisories: Breach notice sent to affected parties
Advisories Provided: The company provides the following advisories to stakeholders and customers following an incident: was Breach notice sent to affected parties.
Entry Point: Access Credentials
Entry Point: MOVEit Transfer software
Root Causes: Social Engineering
Root Causes: Zero-day vulnerability in MOVEit Transfer software
Last Attacking Group: The attacking group in the last incident was an United States Postal Service (USPS).
Most Recent Incident Detected: The most recent incident detected was on 2017-08-29.
Most Recent Incident Publicly Disclosed: The most recent incident publicly disclosed was on 2012-07-31.
Most Significant Data Compromised: The most significant data compromised in an incident were names, addresses, Social Security numbers, driver’s license numbers, state identification numbers, financial account information, , Social Security Numbers (SSN), medical records, , PII, names, partial mailing addresses, Social Security numbers, dates of birth, , names, addresses, dates of birth, Social Security numbers, retirement plan details, , Names, Social Security numbers, , names, dates of birth, Social Security numbers, , customer names, Social Security numbers, 401(k) balance information, , names, addresses, Social Security Numbers, financial details and .
Most Sensitive Data Compromised: The most sensitive data compromised in a breach were retirement plan details, Social Security Numbers, PII, Social Security numbers, addresses, dates of birth, driver’s license numbers, customer names, 401(k) balance information, partial mailing addresses, financial account information, medical records, financial details, Social Security Numbers (SSN), state identification numbers, names and Names.
Number of Records Exposed in Most Significant Breach: The number of records exposed in the most significant breach was 460.0.
Most Recent Source: The most recent source of information about an incident are Maine Attorney General's Office, Massachusetts Office of Consumer Affairs and Business Regulation and California Office of the Attorney General.
Most Recent Customer Advisory: The most recent customer advisory issued was an Breach notice sent to affected parties.
Most Recent Entry Point: The most recent entry point used by an initial access broker were an Access Credentials and MOVEit Transfer software.
Most Significant Root Cause: The most significant root cause identified in post-incident analysis was Social Engineering, Zero-day vulnerability in MOVEit Transfer software.
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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.
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