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University of Mississippi Medical Center (“UMMC”): data breach filings, state by state

University of Mississippi Medical Center (“UMMC”) has 3 data breach filings on record in 3 government portals. The latest was reported to Massachusetts OCABR on Nov 3, 2026, with 64 Massachusetts residents. Data exposed, as filed: Social Security number, Medical / health information, Financial / bank account, Driver's license / state ID.

81residents counted in 2 states (MA, VT). Latest filing per state, last twelve months
3filings in 3 government portals
Nov 3, 2026latest filing, Massachusetts OCABR

By portal

PortalFilingsLatest reportPeople in the latest filing
Massachusetts OCABR1Nov 3, 202664 Massachusetts residents
Vermont AG1Nov 2, 202617 Vermont residents
California AG1Nov 2, 2026Not published

Counts are the organization's own, as filed with each agency. Most state portals count their own residents only, so no single state shows the whole incident. An organization can file more than once for the same incident, and for different ones.

Case file

Breach window
Feb 19, 2026
Discovered
Feb 19, 2026, as stated in the California letter
Offered to those affected
credit or identity monitoring through Experian (term not stated in the letter we read)
Third party named
Yes, the letter attributes the incident to a vendor or service provider
Days to notice
Past the statutory period in all 2 states that set one, counted from discovery to each state's first record

Open the case fileWord document

Every filing with the agency links, each state's record against its statutory period with the citation, what the letter offers, prior incidents. Letter facts are quoted so you can check them.

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Every filing

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
University of Mississippi Medical Center (“UMMC”) California AG CA Nov 2, 2026 Not published Medical / health information

Data reproduced from public government filings. Each row opens the record with the agency link. Spot an error? Email support@breachtally.com with the page link. Corrections are applied and noted.