HackingGovernmentGovernmentTargetedCustomer Data InvolvedPIIIdentity (basic)Government IDMediumContained

Village of Mundelein

bd_2dd40f5160ac49d6 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Oct 17, 2025

Filed

Nov 12, 2025

To disclose

26 days

Affected

1state residents only

Linked

4 filings

Confidence

66%

Full breach record for Village of Mundelein →

Village of Mundelein notified Montana residents of unauthorized network access occurring between Jan 13 and Feb 1, 2025. Discovered Oct 17, 2025, the incident compromised personal information including SSNs. The Village engaged forensic investigators and offers credit monitoring via Epiq.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 277 days

discovery → filing · 26 days

Jan 13, 2025

Begins

Oct 17, 2025

Discovered

Nov 12, 2025

Filed

This filing is one of 4 filings about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (3) · sorted by filing gap

Indiana State AGbd_b1d8db8299be1b8d2025-11-12Verified
Massachusetts State AGbd_8d383054c8dc8dae2025-11-13 · +1dVerified
Illinois State AGbd_1578409f7171ae912025-11-01 · +11dVerified

Name: Village of Mundelein
norm: village of mundelein

Name: Village of Mundelein
norm: village of mundelein
Industry: Governmentllm

Discovered: Oct 17, 2025
Breach occurred: Jan 13, 2025 – Feb 1, 2025
Undetected for: 277 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: 1state-resident count only
Data types: PIIIdentity (basic)Government ID
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Initial access: valid_credentials

During the incident: Worked to contain the threat and secure our internal environment
Commenced a prompt and thorough investigation into the incident
Worked very closely with external cybersecurity professionals
Offering a complimentary month membership through Epiq
Changes made: Continually evaluate and modify our practices and internal controls to enhance the security and privacy of your personal information
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 26 days(26 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 4 filings · 4 states

View merged incident ↗

Illinois State AGNov 1 · first

Indiana State AG+11d

Montana State AG+11d · this page

Massachusetts State AG+12d

Pattern: first filing Nov 1 (IL), last Nov 13 (MA) — a 12-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://dojmt.gov/wp-content/uploads/2025/11/Consumer-notification-letter-31.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Nov 12, 2025
Raw hash: dc362b2865a21e324fcf41570f1edc6173a3ce7628c448c4cd33861bd7994059

Linked disclosures

Regulatory filings (3) · sorted by filing gap

Reporting entityVillage of Mundelein

Victim entityVillage of Mundelein

Incidentdiscovered Oct 17, 2025

Stated responseWorked to contain the threat and secure our internal environment

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov