Frost Bank data breach (2026)

GLOBALClaimed by EverestFirst sightinglinked via multi-signal match · 100%

Posted to leak site Apr 20, 2026bd_5a86e8b29efb82bf

Frost Bank is a Texas-based financial institution and a subsidiary of Cullen/Frost Bankers, Inc. Founded in 1868 and headquartered in San Antonio, it operates across major Texas cities offering personal and commercial banking, wealth management, insurance, and investment services. As one of the largest independent banks in Texas, it serves individuals, businesses, and institutions within the United States financial services industry.

🏛️Massachusetts State AGlinked via operator-confirmed · 100%

⭐Texas State AGlinked via multi-signal match · 100%

Filed May 20, 2026bd_5f4aac65b3dc3f39

Frost Bank based in San Antonio, Texas, a financial services entity reported a data breach to the Texas Attorney General. The breach was discovered on 2026-04-22 and reported on 2026-05-20. 191,848 Texas residents were affected. 200,271 individuals affected in total. Types of information involved: Name of individual;Address;Social Security Number Information;Financial Information (e.g. account number, credit or debit card number);Date of Birth. Consumers were notified via U.S. Mail.

Affected (this filing): 191,848

TX AG ≤30d

🐻California State AGlinked via shared-victim match · 100%

Filed May 20, 2026bd_b213ce708cd456a5

Frost Bank reported a data security breach to the California Attorney General. The incident occurred on December 6, 2025. The notice template indicates that personal information, including identity and financial data, was potentially compromised. Affected individuals are offered credit monitoring services. Specific details regarding the nature of the breach, the number of affected individuals, and the discovery date are not provided in the available filing summary or the generic notice template.

Frost Bank

Litigation Timing

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