Oakland Museum of California (United States) notified the California Attorney General of a data breach on 12 November 2025. The breach began on 10 July 2025, 125 days before it was reported.
Status
Confirmed breach
People affected
Not reported yet
Reported
12 November 2025
Breach began
10 July 2025
Time to tell
125 days (the median in California’s notices over the last year: 154 days)
What was exposed
The register’s list does not say what was exposed; the notice it links to (under Sources) usually does.
Before the notice: the ransomware gang Lynx named Oakland Museum of California on its leak site on 1 September 2025, 72 days before this was reported. Matched by the organisation’s name: the notice itself does not say who the attacker was.
Look for Oakland Museum of California’s own notice or letter: it should say what of yours was involved. Keep it.
The register’s list does not say what was exposed; the notice it links to (under Sources) usually does. If Oakland Museum of California has a password of yours, change it now to be safe.
Expect scams that use your details: calls, texts or emails pretending to be Oakland Museum of California, your bank or the police. Never give codes or passwords, never approve a sign-in you did not start, never move money.
Privacy Unpacked