HackingHealthcareHealthcareCustomer Data InvolvedIdentity (basic)Government IDHealth (basic)Financial accountMediumContained

Western Montana Mental Health Center

bd_3e621ed6b0cebeef · schema v1 · pii pii-v2

Severity

Medium

Discovered

Sep 15, 2024

Filed

Jul 17, 2025

To disclose

—

Affected

10state residents only

Linked

8 filings

Confidence

67%

Full breach record for Western Montana Mental Health Center →2 incidents on file

Western Montana Mental Health Center (WMMHC) notified the Nebraska Attorney General of a data breach affecting approximately 10 Nebraska residents. On September 15, 2024, WMMHC discovered unauthorized access to files containing personal and protected health information, including SSNs, driver's licenses, and medical data. Notifications were mailed on July 17, 2025, offering 12 months of identity protection. WMMHC engaged forensic experts and law enforcement (FBI).

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Incident timeline

Sep 15, 2024

Discovered

Jul 17, 2025

Filed

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

Montana State AGbd_302a8478f032d5e02025-07-17Candidate
Vermont State AGbd_48f24baf2ecae00e2025-07-17Verified
Montana State AGbd_5dd79b9c22b6bdc72025-07-17Verified
Indiana State AGbd_6ec13e1ebb9b4d082025-07-17Verified

Show 3 more filings ↓up to 1d gap

Maine State AGbd_154ae35704eb43312025-07-18 · +1dVerified by operator
Massachusetts State AGbd_67a72bd7f639a7b72025-07-18 · +1dVerified
New Hampshire State AGbd_c165bdbada433eae2025-07-18 · +1dVerified

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

Name: Western Montana Mental Health Center
norm: western montana mental health center
Industry: Healthcarellm

Discovered: Sep 15, 2024
Materiality determined: —
Notification sent: Jul 17, 2025
Affected individuals: 10state-resident count only
Data types: Identity (basic)Government IDHealth (basic)Financial account
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing Application
Threat actor: External
Regulator citations: Notified the Federal Bureau of Investigation
Initial access: exploit_public_facing

During the incident: Retained cybersecurity experts and launched a forensics investigation
Engaged a third-party data review team
Implemented additional security measures to further harden its digital environment
Notifying the affected individuals
Offering 12 months of complimentary identity protection services
Notified the Federal Bureau of Investigation
Changes made: Implemented additional security measures to further harden its digital environment
Source: Quoted from the filing itself, not independently verified.

Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 8 filings · 7 states

View merged incident ↗

Montana State AGJul 17 · first

Vermont State AGJul 17 · first

Montana State AGJul 17 · first

Indiana State AGJul 17 · first

Nebraska State AGJul 17 · first · this page

Maine State AG+1d

Massachusetts State AG+1d

New Hampshire State AG+1d

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://nebraska.gov/ago/data-breach/documents/3f60aaed-d6e8-4f37-b01d-516d2043cee5.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jul 17, 2025
Raw hash: 8ecb0b0af6014685f682daed40d4460a8be3280ce595ad0e48e6203cd586dcb0

Linked disclosures

Regulatory filings (7) · sorted by filing gap

Reporting entityConstangy, Brooks, Smith & Prophete, LLP

Victim entityWestern Montana Mental Health Center

Incidentdiscovered Sep 15, 2024

Stated responseRetained cybersecurity experts and launched a forensics investigation

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancenebraska.gov