Yu Ming Charter School

Yu Ming Charter School notified California AG on Nov 4, 2026 of a data breach, which occurred on May 22, 2026. Data exposed: Social Security number, Passport number, Financial / bank account, Date of birth, Usernames / passwords, Military ID, Postal address, Name.

Case file (dates, days to notice against the statute, what the letter offers, prior incidents)

Organization: Yu Ming Charter School
Source: California AG · source record
Date reported: Nov 4, 2026
Date(s) of breach: Friday, May 22, 2026
Residents affected: Not published by this source
Data exposed: Social Security number Passport number Financial / bank account Date of birth Usernames / passwords Military ID Postal address Name
Notice letter: Sample notice (PDF)
Discovered: Sep 25, 2026, as stated in the letter
"On September 25, 2026, ETS identified unauthorized activity involving an SFTP site used to exchange California statewide assessment information with CDE."
Days to notice: 40 days from discovery (Sep 25, 2026) to the California record (Nov 4, 2026). 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
First seen by BreachTally: 2026-11-05 19:01 UTC

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

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