HackingFinancial ServicesFinanceStolen CredentialsCustomer Data InvolvedPIIIdentity (basic)Government IDMediumContained

CROSS VALLEY FEDERAL CREDIT UNION

bd_3e85ee612d703525 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Dec 4, 2024

Filed

Mar 23, 2025

To disclose

16 weeks

Affected

1state residents only

Linked

8 filings

Confidence

63%

Full breach record for CROSS VALLEY FEDERAL CREDIT UNION →

Cross Valley Federal Credit Union notified Montana residents of a cybersecurity incident discovered on December 4, 2024. Unauthorized access to member data occurred. The Credit Union engaged forensic experts and implemented security enhancements including enhanced training and email sandboxing. Affected individuals are offered 12 months of credit monitoring.

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Incident timeline

discovery → filing · 16 weeks / 109 days

Dec 4, 2024

Discovered

Mar 23, 2025

Filed

vs. sector median

+7 wks slower

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

Vermont State AGbd_5a2dd1243a17f6572025-03-23Verified
Maine State AGbd_cd7fbb993e7577312025-03-23Verified
New Hampshire State AGbd_92dd0552a9389e0d2025-03-24 · +1dVerified
Massachusetts State AGbd_825de0f7519715012025-03-22 · +1dVerified

Show 3 more filings ↓up to 10d gap

Indiana State AGbd_0ef8a32959bc633f2025-03-13 · +10dVerified
Nebraska State AGbd_7eb9456dfc38bcf72025-03-13 · +10dVerified
Maryland State AGbd_e7b9ee333bc1faf82025-03-13 · +10dVerified

Name: CROSS VALLEY FEDERAL CREDIT UNION
norm: cross valley federal credit union

Name: CROSS VALLEY FEDERAL CREDIT UNION
norm: cross valley federal credit union
Industry: Financial Servicesllm

Discovered: Dec 4, 2024
Materiality determined: —
Notification sent: Mar 13, 2025
Affected individuals: 1state-resident count only
Data types: PIIIdentity (basic)Government ID
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Regulator citations: provided preliminary notice of the incident to regulators as required by law
Initial access: valid_credentials

During the incident: Took steps to contain the intrusion and secure its environment
Engaged outside cybersecurity experts to conduct a comprehensive investigation
Provided preliminary notice of the incident to regulators as required by law
Offering free credit monitoring and identity theft protection services
Changes made: Implemented enhanced security training
Implemented additional verification clicks before emails links open
Implemented sandboxing potential email threats
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 16 weeks(109 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 8 filings · 8 states

View merged incident ↗

Indiana State AGMar 13 · first

Nebraska State AGMar 13 · first

Maryland State AGMar 13 · first

Massachusetts State AG+9d

Vermont State AG+10d

Maine State AG+10d

Montana State AG+10d · this page

New Hampshire State AG+11d

Pattern: first filing Mar 13 (IN), last Mar 24 (NH) — a 11-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://dojmt.gov/wp-content/uploads/2025/04/Consumer-notification-letter-25.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Mar 23, 2025
Raw hash: 0346ce57bf7bf6e6adcb8428972f08a72dd47345d78771e5dcc1baae6f04c27a

Linked disclosures

Regulatory filings (7) · sorted by filing gap

Reporting entityCROSS VALLEY FEDERAL CREDIT UNION

Victim entityCROSS VALLEY FEDERAL CREDIT UNION

Incidentdiscovered Dec 4, 2024

Stated responseTook steps to contain the intrusion and secure its environment

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov