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Latest / California / November 2026

University of Mississippi Medical Center (“UMMC”)

University of Mississippi Medical Center (“UMMC”) notified California AG on Nov 2, 2026 of a data breach, which occurred on Feb 19, 2026. Data exposed: Medical / health information.

All 3 filings by University of Mississippi Medical Center (“UMMC”), state by state · Case file (dates, days to notice against the statute, what the letter offers, prior incidents)

Organization
University of Mississippi Medical Center (“UMMC”)
Source
California AG · source record
Date reported
Nov 2, 2026
Date(s) of breach
Wednesday, February 11, 2026Thursday, February 19, 2026
Residents affected
Not published by this source
Data exposed
Medical / health information
Notice letter
Sample notice (PDF)
Discovered
Feb 19, 2026, as stated in the letter
"On or about February 19, 2026, UMMC became aware of unauthorized access to our computer network."
Days to notice
256 days from discovery (Feb 19, 2026) to the California record (Nov 2, 2026). Statute: 30 days from discovery or notification of the breach (Cal. Civ. Code § 1798.82). Over the statutory period
Offered in the letter
credit or identity monitoring through Experian
Third party
The letter attributes the incident to a vendor or service provider
First seen by BreachTally
2026-11-03 17:01 UTC

Dates and counts as filed by the organization with the agency. The breach window and the report date often differ by months.

First seen by BreachTally at 17:01 UTC on Nov 3, 2026. New filings reach paid subscribers within 30 minutes of the agency posting, with the count, the data exposed and the letter. Start a 14-day free trial. We email you two days before the first charge and you cancel in one click.
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Other filings by University of Mississippi Medical Center (“UMMC”)

OrganizationSourceStateReportedResidents affectedData exposed
University of Mississippi Medical Center (“UMMC”) Massachusetts OCABR MA Nov 3, 2026 64 Social Security numberMedical / health informationFinancial / bank accountDriver's license / state ID
University of Mississippi Medical Center (UMMC) Vermont AG VT Nov 2, 2026 17 Social Security numberFinancial / bank accountMedical / health information

Data reproduced from a public government filing. Spot an error? Email support@breachtally.com with the record link. Corrections are applied and noted.