HackingFinancial ServicesFinanceStolen CredentialsCustomer Data InvolvedFinancialFinancial accountIdentity (basic)Government IDMediumContained

Gain Federal Credit Union

bd_05e319c765c5dc36 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Oct 20, 2025

Filed

Feb 5, 2026

To disclose

15 weeks

Affected

11state residents only

Linked

4 filings

Confidence

66%

Full breach record for Gain Federal Credit Union →2 incidents on file

Gain Federal Credit Union notified members of unauthorized access to one user's email discovered on October 20, 2025. Potentially exposed data includes names, addresses, account numbers, and financial/loan information. The credit union launched an internal investigation, engaged third-party forensics, and reported to authorities. No evidence of data misuse was found. Notices were sent on February 4, 2026.

J jump to incidentP pin to compareR raw source

Massachusetts clock✗ MA AG >90d15 weeks discovery → filing

Incident timeline

discovery → filing · 15 weeks / 108 days

Oct 20, 2025

Discovered

Feb 5, 2026

Filed

vs. sector median

+7 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

Nebraska State AGbd_222c243edea4fb522026-02-04 · +1dVerified
California State AGbd_ca9f5fe590c9106d2026-02-04 · +1dCandidate
Indiana State AGbd_fde3c66c99ad683e2026-02-04 · +1dVerified

Name: Gain Federal Credit Union
norm: gain federal credit union

Name: Gain Federal Credit Union
norm: gain federal credit union
Industry: Financial Servicesllm

Discovered: Oct 20, 2025
Materiality determined: —
Notification sent: Feb 4, 2026
Affected individuals: 11state-resident count only
Data types: FinancialFinancial accountIdentity (basic)Government ID
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1114 Email Collection
Threat actor: External
Regulator citations: Reported the matter to appropriate authorities
Initial access: valid_credentials

During the incident: Launched an internal investigation
Reported the matter to appropriate authorities
Retained independent third-party forensics firms to investigate the incident
Sought the advice of legal and cyber-security experts
Notifying members whose information may have been affected
Changes made: Providing guidance on steps to protect personal information
Offering to issue a new account number upon request
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 15 weeks(108 days from discovery to filing)
Compliance flags: MA AG >90d
Discovery-date grounding: letter-groundedThe discovery date is the detection date narrated in the notification letter — the defensible tier.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 4 filings · 4 states

View merged incident ↗

Nebraska State AGFeb 4 · first

California State AGFeb 4 · first

Indiana State AGFeb 4 · first

Massachusetts State AG+1d · this page

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.mass.gov/doc/2026-168-gain-federal-credit-union/download
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Feb 5, 2026
Raw hash: ea1b5c07e9eef016e26ddfadf03f62f35b3430111a4e0987b2c4d27fbdf0eb0d

Linked disclosures

Regulatory filings (3) · sorted by filing gap

Reporting entityGain Federal Credit Union

Victim entityGain Federal Credit Union

Incidentdiscovered Oct 20, 2025

Stated responseLaunched an internal investigation

ComplianceMA AG >90d

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov