AltaMed Health Services Corporation notified the California AG of a data breach involving its third-party vendor, Vitality Group. The incident stemmed from a vulnerability in the MOVEit file transfer program exploited on May 30, 2023. Vitality identified the risk on June 1, 2023, and disconnected the server. Affected data included names, addresses, dates of birth, email addresses, and Social Security numbers. AltaMed is offering two years of credit monitoring to affected members.