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Regulator-posted notice

Breach notice filed by Cullen/Frost Bankers, Inc. (March 2026)

Organization named: Cullen/Frost Bankers, Inc. Provisional: identity as filed, not yet matched to the directory
Type as the source lists it: Hacking/IT Incident

What the sources say

HHS OCR breach portal (HIPAA breaches affecting 500 or more individuals) Primary notice

Posted on the HHS Office for Civil Rights breach portal with a submission date of March 26, 2026.

Organization as reported
Cullen/Frost Bankers, Inc., TX
Entity type as reported
Health Plan
Category as reported
Hacking/IT Incident
Location of information as reported
Network Server
Submission date
March 26, 2026
Observed by BreachRecords
2026-10-18 16:15 UTC (revision 8947, row:86)
Archived copy
Held in the private archive (provenance)

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.

The source's own words, from the revision above.

Figures, per source

  • 4,698 individuals affected (total reported), according to the HHS Office for Civil Rights breach portal, source date March 26, 2026, revision observed 2026-10-18.

Each figure is one source's figure with the basis that source gave. Figures from different sources are shown side by side and are not added, averaged or chosen between.

Timeline

Source dates are the dates the sources give. Observation dates are when BreachRecords recorded each revision.

  • Submission date (HHS Office for Civil Rights breach portal)
  • Observed by BreachRecords (revision 8947)
  • Approved by a reviewer

Organizations linked by a reviewer

  • Cullen/Frost Bankers, Inc. Named as the covered entity Provisional: identity as filed, not yet matched to the directory Linked 2026-10-19, method provisional.

Archived evidence

  • 3dbc27dd5742e041cc1e7fe18cc669e2901fbd3b86b7007ed27948ff4d406e1f
    text/csv, 5,530,996 bytes, retrieved from HHS Office for Civil Rights breach portal, 2026-10-18 16:15 UTC. Archived privately · Provenance · Source page

Records reflect source filings as of the dates shown. BreachRecords is not a regulator.

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