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Confirmed breach · 4 breaches on record

Massachusetts Mutual Life Insurance Company data breach

USUnited States

Massachusetts Mutual Life Insurance Company (United States) notified the Vermont Attorney General and the Indiana Attorney General of a data breach on 1 May 2026. It affected 200 people. Exposed: Social Security numbers and Health and medical information.

Breach reported 1 May 2026

Status
Confirmed breach
People affected
200 people
Reported
1 May 2026

What was exposed

  • Social Security numbers
  • Health and medical information

What changed since it was first reported

  1. Confirmed breach, 200 people (Indiana Attorney General)

Sources

Official notices are read by code from the regulator’s own register. More notices to Vermont, Indiana. · Corrections and changes

Breach reported 13 February 2026

Status
Confirmed breach
People affected
29 people
Reported
13 February 2026
Breach began
7 April 2025
Time to tell
312 days (the median in California’s notices over the last year: 154 days)

What was exposed

The register’s list does not say what was exposed; the notice it links to (under Sources) usually does.

Sources

Official notices are read by code from the regulator’s own register. More notices to Indiana. · Corrections and changes

Breach reported 21 March 2024

Status
Confirmed breach
People affected
Not reported yet
Reported
21 March 2024
Breach began
29 October 2023
Time to tell
144 days (the median in California’s notices over the last year: 154 days)

What was exposed

The register’s list does not say what was exposed; the notice it links to (under Sources) usually does.

Sources

Official notices are read by code from the regulator’s own register. More notices to California. · Corrections and changes

Breach reported 27 April 2023

Status
Confirmed breach
People affected
Not reported yet
Reported
27 April 2023
Breach began
1 February 2023
Time to tell
85 days (the median in California’s notices over the last year: 154 days)

What was exposed

The register’s list does not say what was exposed; the notice it links to (under Sources) usually does.

Sources

Official notices are read by code from the regulator’s own register. More notices to California. · Corrections and changes

If Massachusetts Mutual Life Insurance Company had your data

  1. Look for Massachusetts Mutual Life Insurance Company’s own notice or letter: it should say what of yours was involved. Keep it.
  2. An ID number cannot be changed, so lock it: a credit freeze or fraud alert in the US, a credit warning (kreditadvarsel) on borger.dk in Denmark, Cifas protective registration in the UK.
  3. Check your health insurer’s statements for treatment you never had.
  4. Expect scams that use your details: calls, texts or emails pretending to be Massachusetts Mutual Life Insurance Company, your bank or the police. Never give codes or passwords, never approve a sign-in you did not start, never move money.

One email to confirm first. We use your address only for this alert, and one click deletes it.

Earlier breaches at Massachusetts Mutual Life Insurance Company

From the official registers’ and Have I Been Pwned’s full histories. A name match: check the notice to be sure it is the same company.

  1. California Attorney General · began 17 August 2017
  2. California Attorney General · began 3 December 2013
  3. California Attorney General · began 13 September 2013
  4. California Attorney General · began 8 May 2013
  5. California Attorney General · began 30 January 2013
  6. California Attorney General · began 13 July 2012

More breaches in United States

  1. Quantum HealthUSUnited States · OH · 28 October 2026 Social Security numbersHealth insurance detailsHealth and medical information+1 273.1KTexas residents
  2. Indico Data SolutionsUSUnited States · MA · 28 October 2026 Social Security numbersDriver’s license numbersGovernment ID numbers+6 2.1KTexas residents
  3. Apollo Asset ManagementUSUnited States · NY · 28 October 2026 Social Security numbersDriver’s license numbersGovernment ID numbers+3 1.5KTexas residents
  4. DBA Tanya AlexanderUSUnited States · TX · 28 October 2026 NamesAddresses 417Texas residents
  5. DMW Retail Enterprises LLC dba Kult of Athena (KOA)USUnited States · IL · 28 October 2026 Financial account and card detailsNames 306Texas residents

Every breach in United States →

From the data breach tracker: official notices, breach databases and the news, every fact with its source. Open data (CC BY 4.0) · How the tracker works · Official registers · Corrections and changes · Found a mistake? Tell us and we correct it.