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Latest / California / August 2025

Columbia University

Columbia University notified California AG on Aug 7, 2025 of a data breach, which occurred on Jun 24, 2025. Data exposed: Social Security number, Financial / bank account, Medical / health information, Date of birth, Name.

All 3 filings by Columbia University, state by state · Case file (dates, days to notice against the statute, what the letter offers, prior incidents)

Organization
Columbia University
Source
California AG · source record
Date reported
Aug 7, 2025
Date(s) of breach
Friday, May 16, 2025Tuesday, June 24, 2025
Residents affected
Not published by this source
Data exposed
Social Security number Financial / bank account Medical / health information Date of birth Name
Notice letter
Sample notice (PDF)
Discovered
May 16, 2025, as stated in the letter
"Our investigation determined that, on or about May 16, 2025, an unauthorized third-party gained access to Columbia’s network and subsequently took certain files from our system."
Days to notice
83 days from discovery (May 16, 2025) to the California record (Aug 7, 2025). Statute: 30 days from discovery or notification of the breach (Cal. Civ. Code § 1798.82). Over the statutory period
Offered in the letter
24 months of credit or identity monitoring through Experian
Third party
The letter attributes the incident to a vendor or service provider
First seen by BreachTally
2026-10-30 15:29 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 15:29 UTC on Oct 30, 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 Columbia University

OrganizationSourceStateReportedResidents affectedData exposed
Columbia University Texas AG TX May 20, 2026 161,544 Social Security numberDriver's license / state IDPassport numberFinancial / bank account+4
Columbia University Oregon DOJ OR Aug 7, 2025 868,969 Not stated

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