2023 MOVEit breach — 837,000 records
Data compromised
Names, SSNs
Technical writeup
May 27–31, 2023. Clop ransomware exploited MOVEit zero-day. Unauthorized access to Fiserv MOVEit server. Flagstar Bank customers affected: names, SSNs. Part of broader MOVEit campaign (2,000+ orgs). Identity monitoring and call center support offered.
Root cause
MOVEit zero-day; Clop ransomware.