Civil Service Employees Association, Inc. (CSEA), Local 1000, AFSCME, AFL-CIO experienced an external system breach (hacking) between May 3 and May 31, 2025, discovered on May 30, 2025. An unauthorized party accessed and exfiltrated files containing member names and Social Security Numbers. Total affected: 47,352 individuals; 6 Maine residents. Notification letters were sent January 20, 2026. No evidence of fraud or identity theft misuse was identified.