HackingFinancial ServicesFinanceStolen CredentialsData ExfiltratedCustomer Data InvolvedIdentity (basic)PIILowContained

CENTRAL ONE FEDERAL CREDIT UNION

bd_1efaabdf724e2a09 · schema v1 · pii pii-v1

Severity

Low

Discovered

Sep 1, 2025

Filed

Nov 10, 2025

To disclose

10 weeks

Affected

26state residents only

Linked

4 filings

Confidence

65%

Full breach record for CENTRAL ONE FEDERAL CREDIT UNION →2 incidents on file

Central One Federal Credit Union notified members of unauthorized access to systems between Aug 26-30, 2025. Suspicious activity was detected shortly before Labor Day 2025. Files containing names and other personal info were acquired. No evidence of identity theft found. Credit monitoring offered.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 6 days

discovery → filing · 10 weeks / 70 days

Aug 26, 2025

Begins

Sep 1, 2025

Discovered

Nov 10, 2025

Filed

vs. sector median

+1 wks slower

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

Linked disclosures

Why this link?

Regulatory filings (3) · sorted by filing gap

Massachusetts State AGbd_2b36e6bc7d9af76d2025-11-10Verified
Nebraska State AGbd_66d16b3700c7e0dd2025-11-10Verified
Texas State AGbd_41d574c5b0ac87002025-11-12 · +2dVerified

Name: CENTRAL ONE FEDERAL CREDIT UNION
norm: central one federal credit union

Name: CENTRAL ONE FEDERAL CREDIT UNION
norm: central one federal credit union
Industry: Financial Servicesllm

Discovered: Sep 1, 2025
Breach occurred: Aug 26, 2025 – Aug 30, 2025
Undetected for: 6 daysoccurrence → discovery
Materiality determined: —
Notification sent: Nov 7, 2025
Affected individuals: 26state-resident count only
Data types: Identity (basic)PII
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Initial access: valid_credentials

During the incident: Proactively took systems offline while we investigated the matter
Arranged for you to enroll in a complimentary, one-year membership of Experian IdentityWorksSM Credit 3B
Changes made: Taking steps to reduce the risk of this type of incident occurring in the future
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 10 weeks(70 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 ↗

Massachusetts State AGNov 10 · first

Nebraska State AGNov 10 · first

Montana State AGNov 10 · first · this page

Texas State AG+2d

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-18.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Nov 10, 2025
Raw hash: 25a3671629f09a271d397700dd8360fc3e8387eb394b884d0f0cc92c0c8d9431

Linked disclosures

Regulatory filings (3) · sorted by filing gap

Reporting entityCENTRAL ONE FEDERAL CREDIT UNION

Victim entityCENTRAL ONE FEDERAL CREDIT UNION

Incidentdiscovered Sep 1, 2025

Stated responseProactively took systems offline while we investigated the matter

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov