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Cullen/Frost Bankers

Disclosed Mar 26, 20264,698 affectedConfirmed

Official notice

The covered entity (CE), Cullen/Frost Bankers, Inc., reported that it was notified by its business associate (BA) that the BA experienced a breach of its network that affected the protected health information (PHI) of 4,698 individuals. The PHI involved names, dates of birth, social security numbers, and other identifiers. The CE notified HHS, the media, and the affected individuals. OCR provided technical assistance to the CE regarding the HIPAA Rules.

What is known

People affected4,698 (as reported to HHS)
DisclosedMar 26, 2026
AttackHacking
Data exposedNamesHealth
SectorInsurance · US
StatusConfirmed

Sources

Notices filed

History of this record
Added2026-09-25
First recordedby backfillSource

First seen 2026-09-25 (HHS archive), confirmed by HHS OCR. Record counts are as reported. Not legal advice.

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