HackingFinancial ServicesFinanceData ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDFinancial accountHighContained

Metrowest Community Federal Credit Union

bd_3778ce4cf42cd676 · schema v1 · pii pii-v1

Severity

High

Discovered

Sep 1, 2025

Filed

Mar 10, 2026

To disclose

27 weeks

Affected · nationwide

20,722132 in this filing

Linked

6 filings

Confidence

65%

Full breach record for Metrowest Community Federal Credit Union →

MetroWest Community Federal Credit Union experienced an external system breach on September 3, 2025, resulting in unauthorized access and copying of files containing names, SSNs, and financial account details. The incident was discovered on September 1, 2025. The credit union notified the FBI and affected individuals, offering 24 months of credit monitoring. Approximately 20,722 individuals were affected, including 132 Maine residents.

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Maine clockDiscovered Sep 1, 2025 → Filed with AG Mar 10, 2026190d ✗ ME AG >90d27 weeks 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

Sep 3, 2025

Begins

Mar 10, 2026

Filed

vs. sector median

+18 wks slower

This filing is one of 6 about the same incident.View merged incident

A leak claim by akira about this victim predates this filing by 136 days.View originating leak claim

Linked disclosures

Why this link?

Ransomware claims (1)

Leak Siteakirabd_116f45d168299bc02025-10-25 · +136dVerified

Regulatory filings (4) · sorted by filing gap

Indiana State AGbd_0c962b2c99ddb8242026-03-10Verified by operator
Vermont State AGbd_27bfc3acf10562e32026-03-06 · +4dVerified
Vermont State AGbd_5f8f7d025bc854f92025-12-29 · +71dVerified by operator
Massachusetts State AGbd_605a72d6d99a2aa92025-12-29 · +71dVerified by operator

Name: Metrowest Community Federal Credit Union
norm: metrowest community federal credit union
Domain: mwcfcu.com
Industry: Financial Services

Name: Metrowest Community Federal Credit Union
norm: metrowest community federal credit union
Domain: mwcfcu.com
Industry: Financial Services
Industry: Financial Servicesllm

Discovered: Sep 1, 2025
Breach occurred: Sep 3, 2025
Materiality determined: —
Notification sent: Mar 10, 2026
Affected individuals: 20,722state + nationwide
Data types: Identity (basic)Government IDFinancial account
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: Provided written notice to relevant state and federal regulators
Initial access: exploit_public_facing

During the incident: Launched an investigation with the assistance of third-party forensic specialists
Undertook a comprehensive review of the data at risk
Notified the Federal Bureau of Investigation
Provided access to credit monitoring services for two years through Experian
Changes made: Implementing additional safeguards and training to its employees
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 27 weeks(190 days from discovery to filing)
Compliance flags: ME AG >90d · 190dME resident >60d · 190dLeak >90d
Discovery-date grounding: 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.
Clock breakdown: Statute Window Elapsed Threshold Status
Maine
Discovered: Sep 1, 2025
→ Filed with AG: Mar 10, 2026
190d 90 days ME AG >90d
Maine
Discovered: Sep 1, 2025
→ Notified: Mar 10, 2026
190d 60 days (analyst band; statutory cap is 30 days) ME resident >60d

Statute	Window	Elapsed	Threshold	Status
Maine	Discovered: Sep 1, 2025 → Filed with AG: Mar 10, 2026	190d	90 days	ME AG >90d
Maine	Discovered: Sep 1, 2025 → Notified: Mar 10, 2026	190d	60 days (analyst band; statutory cap is 30 days)	ME resident >60d

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 5 filings · 4 states

View merged incident ↗

Vermont State AGDec 29 · first

Massachusetts State AGDec 29 · first

Vermont State AG+67d

Indiana State AG+71d

Maine State AG+71d · this page

Pattern: first filing Dec 29 (VT), last Mar 10 (ME) — a 71-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-a1252b4f8318/8a400b3d-1668-40ec-beff-e92f8d0934d8.html
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Mar 10, 2026
Raw hash: 43f50e7e3da0ba2dea13872ee7fbbe7f33b71c442309bb8d616d0025bcacbfbe

Linked disclosures

Ransomware claims (1)

Regulatory filings (4) · sorted by filing gap

Reporting entityMetrowest Community Federal Credit Union

Victim entityMetrowest Community Federal Credit Union

Incidentdiscovered Sep 1, 2025

Stated responseLaunched an investigation with the assistance of third-party forensic specialists

ComplianceME AG >90d

Extraction provenanceno artifact recorded

Source provenancewww.maine.gov