DisclosureLens
HackingGovernmentGovernmentData ExfiltratedTargetedIdentity (basic)Government IDCriticalContained

Thornton Township

bd_3a65aadb8cd96c6f · schema v1 · pii pii-v1

Severity

Critical

Discovered

Mar 18, 2025

Filed

Apr 20, 2026

To disclose

13 months

Affected · nationwide

153,6171 in this filing

Linked

2 filings

Confidence

66%
Full breach record for Thornton Township →2 incidents on file

Thornton Township (IL) reported an external system breach (hacking) occurring between March 10-18, 2025. The incident was discovered on March 18, 2025, and notifications were sent on April 9, 2026. Approximately 153,617 individuals were affected, including 1 Maine resident. Personal information, including names and government identifiers, was potentially acquired. The FBI was notified, and IDX credit monitoring services were offered.

Maine clockDiscovered Mar 18, 2025 → Filed with AG Apr 20, 2026398d ✗ ME AG >90d13 months discovery → filing
⚠ unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Incident timeline

undetected · 8 days
discovery → filing · 13 months / 398 days

Mar 10, 2025

Begins

Mar 18, 2025

Discovered

Apr 20, 2026

Filed

This filing is one of 2 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

Filing propagation · 2 filings · 2 states

View merged incident ↗
Massachusetts State AGApr 20 · first
Maine State AGApr 20 · first · this page

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.