HackingFinancial ServicesFinanceStolen CredentialsCustomer Data InvolvedPIIIdentity (basic)LowContained

CO-OP Credit Union

bd_47ab496b78cc9ea1 · schema v1 · pii pii-v2

Severity

Low

Discovered

Apr 8, 2025

Filed

Oct 20, 2025

To disclose

—

Affected

Not disclosed

Linked

3 filings

Confidence

65%

Full breach record for CO-OP Credit Union →2 incidents on file

Co-op Credit Union notified Nebraska residents that an unauthorized party accessed an employee email account between April 8 and April 18, 2025. The incident involved names and other personal data. The credit union engaged forensic investigators and offered one year of Experian IdentityWorks credit monitoring to affected individuals. No evidence of identity theft was found.

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Incident timeline

Apr 8, 2025

Begins

Apr 8, 2025

Discovered

Oct 20, 2025

Filed

This filing is one of 3 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (2) · sorted by filing gap

Montana State AGbd_b6608c610ec419662025-10-20Candidate
Massachusetts State AGbd_67218060f7e99fa42025-10-21 · +1dVerified

Name: CO-OP Credit Union
norm: co op credit union

Name: CO-OP Credit Union
norm: co op credit union
Industry: Financial Servicesllm

Discovered: Apr 8, 2025
Breach occurred: Apr 8, 2025 – Apr 18, 2025
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jul 23, 2025
Affected individuals: Not disclosed
Data types: PIIIdentity (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Initial access: valid_credentials

During the incident: Launched an investigation
Engaged a third-party forensic firm to further investigate and confirm the security of our email environment
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.

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

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 3 filings · 3 states

View merged incident ↗

Montana State AGOct 20 · first

Nebraska State AGOct 20 · first · this page

Massachusetts 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/df471daf-9609-46c5-9ded-58beae456fed.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Oct 20, 2025
Raw hash: 7b767b1be7c617c006258cfd56c282307cee0d351589bc462c9edd2fa2bb285c

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityCO-OP Credit Union

Victim entityCO-OP Credit Union

Incidentdiscovered Apr 8, 2025

Stated responseLaunched an investigation

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancenebraska.gov