HackingGovernmentGovernmentVulnerability ExploitStolen CredentialsData ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDFinancial accountHighContained

City of Sheboygan, Wisconsin

bd_45814e27fc558ab0 · schema v1 · pii pii-v1

Severity

High

Discovered

May 14, 2025

Filed

May 23, 2025

To disclose

9 days

Affected · nationwide

67,9476 in this filing

Linked

8 filings

Confidence

65%

Full breach record for City of Sheboygan, Wisconsin →

City of Sheboygan, Wisconsin reported a data breach affecting 67,947 individuals. Unauthorized access occurred on October 31, 2024, discovered on May 14, 2025. Affected data included names, SSNs, driver's licenses, and financial account numbers. The City engaged forensic investigators and offered 12 months of credit monitoring.

J jump to incidentP pin to compareR raw source

Maine clockDiscovered May 14, 2025 → Filed with AG May 23, 20259d ✓ ME AG ≤30d9 days discovery → filing

⚠ AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Incident timeline

undetected · 195 days

discovery → filing · 9 days

Oct 31, 2024

Begins

May 14, 2025

Discovered

May 23, 2025

Filed

vs. sector median

10 wks faster

This filing is one of 8 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (7) · sorted by filing gap

Vermont State AGbd_1560bc395c14449a2025-05-23Verified
Massachusetts State AGbd_51749ce7285456bf2025-05-23Verified
Montana State AGbd_c32f4b3a9475c7522025-05-23Candidate
New Hampshire State AGbd_d14911d9b43d29c82025-05-23Verified

Show 3 more filings ↓up to 22d gap

Indiana State AGbd_e635a31fccfec0df2025-05-23Verified
Texas State AGbd_c6faf60f6b26bb842025-05-27 · +4dVerified
Illinois State AGbd_d24f2c0b650a32f32025-05-01 · +22dVerified

Name: Constangy, Brooks, Smith & Prophete, LLP
norm: constangy brooks smith prophete

Name: City of Sheboygan, Wisconsin
norm: city of sheboygan wisconsin
Industry: Governmentllm

Discovered: May 14, 2025
Breach occurred: Oct 31, 2024
Undetected for: 195 daysoccurrence → discovery
Materiality determined: —
Notification sent: May 23, 2025
Affected individuals: 67,947state + nationwide
Data types: Identity (basic)Government IDFinancial account
Data elements: Social Security numberDate of birth
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1078 Valid Accounts
Threat actor: ExternalFinancial
Regulator citations: Notified Maine Attorney General
Initial access: exploit_public_facing

During the incident: Engaged a digital forensics and incident response firm
Conducted a comprehensive review of the data involved
Offering complimentary identity protection services
Changes made: Implementing additional security measures
Implemented additional technical security measures to enhance the security of our network
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 9 days(9 days from discovery to filing)
Compliance flags: ME AG ≤30d · 9d
Discovery-date grounding: AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.
Clock breakdown: Statute Window Elapsed Threshold Status
Maine
Discovered: May 14, 2025
→ Filed with AG: May 23, 2025
9d 30 days ME AG ≤30d

Statute	Window	Elapsed	Threshold	Status
Maine	Discovered: May 14, 2025 → Filed with AG: May 23, 2025	9d	30 days	ME AG ≤30d

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 8 filings · 8 states

View merged incident ↗

Illinois State AGMay 1 · first

Vermont State AG+22d

Massachusetts State AG+22d

Montana State AG+22d

New Hampshire State AG+22d

Indiana State AG+22d

Maine State AG+22d · this page

Texas State AG+26d

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

Leak-site claim

Attacker assertion only. Establishes: claim date, group, alleged victim.

Press / market report

Unlocks: incident narrative, operational impact. Still no compliance clock.

State AG / regulator filingThis record

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statement

Unlocks: materiality, stated response, full audit trail. Ceiling removed.

Source URL: https://www.maine.gov/agviewer/content/ag/985235c7-cb95-4be2-8792-a1252b4f8318/1f937a68-1811-49e4-afe6-f0d34edbb837.html
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: May 23, 2025
Raw hash: 581a06c5342ccdac65f5cbe6d903842c5ed351119dc89a61ef745b063ba281fe

Linked disclosures

Regulatory filings (7) · sorted by filing gap

Reporting entityConstangy, Brooks, Smith & Prophete, LLP

Victim entityCity of Sheboygan, Wisconsin

Incidentdiscovered May 14, 2025

Stated responseEngaged a digital forensics and incident response firm

ComplianceME AG ≤30d

Extraction provenanceno artifact recorded

Source provenancewww.maine.gov