City of Sheboygan, Wisconsin
bd_d14911d9b43d29c8 · schema v1 · pii pii-v1
Full breach record for City of Sheboygan, Wisconsin →The City of Sheboygan, Wisconsin experienced an encryption event (ransomware) on October 31, 2024, resulting in network disruption. An investigation revealed unauthorized access to certain data. On May 14, 2025, the City determined that personal information of two New Hampshire residents was affected. Notices were sent on May 23, 2025. The City engaged forensic investigators, secured its environment, and is implementing additional security measures and offering identity protection services.
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Incident timeline
Oct 31, 2024
Begins
Oct 31, 2024
Discovered
May 23, 2025
Filed
vs. sector median
+18 wks slower
Linked disclosures
Why this link?Regulatory filings (7) · sorted by filing gap
- Vermont State AGbd_1560bc395c14449a2025-05-23Verified
- Maine State AGbd_45814e27fc558ab02025-05-23Candidate
- Massachusetts State AGbd_51749ce7285456bf2025-05-23Verified
- Montana State AGbd_c32f4b3a9475c7522025-05-23Candidate
Show 3 more filings ↓Show fewer ↑up to 22d gap
- Indiana State AGbd_e635a31fccfec0df2025-05-23Verified
- Texas State AGbd_c6faf60f6b26bb842025-05-27 · +4dVerified
- Illinois State AGbd_d24f2c0b650a32f32025-05-01 · +22dVerified
Filing propagation · 8 filings · 8 states
View merged incident ↗Pattern: first filing May 1 (IL), last May 27 (TX) — a 26-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?
Evidence ladder
Attacker assertion only. Establishes: claim date, group, alleged victim.
Unlocks: incident narrative, operational impact. Still no compliance clock.
Unlocks: discovery date, data types, affected count, compliance clock.
Unlocks: materiality, stated response, full audit trail. Ceiling removed.