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Confirmed breach

Frost Bank data breach

USUnited States · TX

Frost Bank (TX, United States) notified the Vermont Attorney General, the Texas Attorney General and the California Attorney General of a data breach on 20 May 2026. It told the states about 191,848 Texas residents; the total can be higher. Exposed: Social Security numbers, Financial account and card details, Dates of birth, Names and Addresses.

Status
Confirmed breach
People affected
191,848 Texas residents (one state’s count; the total can be higher)
Reported
20 May 2026
Across the state notices
at least 191,866 people (Vermont and Texas: each state counts only its own residents)

What was exposed

  • Social Security numbers
  • Financial account and card details
  • Dates of birth
  • Names
  • Addresses

Before the notice: the ransomware gang Everest named Frost Bank on its leak site on 20 April 2026, 30 days before this was reported. Matched by the organisation’s name: the notice itself does not say who the attacker was.

What changed since it was first reported

  1. Confirmed breach, 191,848 Texas residents (Texas Attorney General)

What the letter says

We have not read this letter yet.

Got a letter or email about this breach? Check it is real →

Read the letter (PDF), as filed with the California Attorney General.

Sources

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

If Frost Bank had your data

  1. Look for Frost Bank’s own notice or letter: it should say what of yours was involved. Keep it.
  2. Call your bank on the number printed on your card (never one from a message), check recent payments and ask for a new card.
  3. 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.
  4. Expect scams that use your details: calls, texts or emails pretending to be Frost Bank, 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.

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.