2026 Suisun City (CA) — cyberattack shuts city network Aug 8; data theft under investigation
Data compromised
Unknown — city does not yet know whether any data was taken; residents to be notified if investigators determine data was taken. Utility billing portals offline; 911/emergency services still operating.
Technical writeup
Verified municipal cyber incident — Suisun City, California shut down its computer network after a Friday morning Aug 8, 2026 cyberattack, declared a state of emergency, and is investigating with federal/state partners (ABC10 Aug 9). Emergency services remain available; residents cannot pay city bills online and will not face late fees. City Manager Bret Prebula and Mayor Alma Hernandez publicly described the response. Whether personal data was exfiltrated remains under investigation — recordsAffected 0 pending determination.
Root cause
Cyberattack Friday morning Aug 8, 2026 led city to shut down its entire computer network as a fail-safe; state of emergency declared Aug 9. DHS, Cal OES and regional agencies assisting (ABC10 / city officials).