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BreachRecord

Frost Bank Data Breach (May 2026): What Was Exposed and What To Do

Last updated Oct 20, 2026 · Based on 2 official filings · See sources

According to the notice filed with the Texas Attorney General on May 20, 2026, Frost Bank reported a data breach. It was also reported to the California Attorney General. People affected: 200,271 people (official total in the Texas Attorney General filing, filed May 20, 2026).

Key facts

From 2 official filings
Organization
Frost Bank
Source: Texas Attorney General, filed May 20, 2026
People affected
200,271
Official total in the Texas Attorney General filing, filed May 20, 2026
Source: Texas Attorney General, filed May 20, 2026
Incident dates
Dec 6, 2025 – Apr 16, 2026
Source: Texas Attorney General, filed May 20, 2026
Discovered Apr 22, 2026
Source: Texas Attorney General, filed May 20, 2026
Notice dates
First filed May 20, 2026
Source: Texas Attorney General, filed May 20, 2026
Information exposed
  • Social Security number
  • Financial account number
  • Date of birth
  • Name
  • Address
Source: Texas AG, May 20, 2026
Filed with
Free credit monitoring
No offer is stated in the filings we have. Check your letter.

What to do now

Steps chosen from the information listed in the official filings. Your own letter may list more.

  1. A credit freeze stops new credit accounts being opened in your name. It is free by law and you can lift it when you need credit: Equifax, Experian and TransUnion.

  2. An IP PIN stops someone else filing a tax return with your Social Security number. Get one from the IRS at irs.gov.

  3. Review recent transactions, ask about account alerts, and ask whether a new account number is recommended.

  4. Scammers often contact people after a breach, pretending to be the organization, a bank or a government agency. Do not give your Social Security number, passwords or codes to anyone who contacts you first.

  5. You can get free credit reports from all three bureaus at AnnualCreditReport.com, the official site.

  6. The Federal Trade Commission's IdentityTheft.gov gives you a personal recovery plan.

Is the letter real?

Letters usually list a phone number for questions. We could not find an official copy of the letter, so check that the organization named in your letter appears in the official filings listed below before you call.

Never give your Social Security number, bank details or passwords to someone who contacts you first.

Timeline

  1. Incident began (earliest date reported) source
  2. Incident ended (latest date reported) source
  3. Organization discovered the incident source
  4. Reported to Texas AG and California AG source

Sources

  1. Texas Attorney General Notice filed May 20, 2026
    Filed as “Frost Bank” · 191,848 Texas residents · total 200,271
    The link opens the agency's list; search it for the organization name.
  2. California Attorney General Notice filed May 20, 2026
    Filed as “Frost Bank”

Last updated Oct 20, 2026. Our summaries are written in our own words from the official filings above. Spotted an error? Report a correction.