Maximus Human Services, Inc. disclosed that an unauthorized party exploited a previously unknown vulnerability in Progress Software's MOVEit Transfer application to access files containing personal information. The incident occurred between May 27 and May 31, 2023, and was detected on May 30, 2023. Maximus took the application offline, applied patches, engaged forensic experts, and notified law enforcement. Affected individuals are offered two years of credit monitoring and identity restoration services.