HackingFinancial ServicesFinanceStolen CredentialsSupply Chain (3P Vendor)Customer Data InvolvedGovernment IDIdentity (basic)Financial accountMediumContained

Alaska Air Group Federal Credit Union

bd_b708e0d4efd7f6da · schema v1 · pii pii-v2

Severity

Medium

Discovered

—

Filed

Apr 16, 2026

To disclose

—

Affected

86state residents only

Linked

9 filings

Confidence

66%

Full breach record for Alaska Air Group Federal Credit Union →

Alaska Air Group Credit Union notified Montana regulators of a cybersecurity incident occurring on or about March 5, 2026, involving a third-party IT service provider. Unauthorized actors accessed AAGCU systems via the provider, potentially copying files containing personal data including SSNs, driver's license numbers, and financial account numbers. AAGCU resecured its environment, engaged forensic experts, and is offering 24 months of credit monitoring. Notification letters were dated April 16, 2026.

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Incident timeline

Mar 5, 2026

Begins

Apr 16, 2026

Filed

This filing is one of 9 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (8) · sorted by filing gap

Indiana State AGbd_34559bdc6ddc4ce52026-04-16Candidate
New Hampshire State AGbd_437e2f1386c30f9c2026-04-16Verified
Oregon State AGbd_280fdc00e92257fe2026-04-17 · +1dVerified
Massachusetts State AGbd_335c6981a3c74afe2026-04-17 · +1dVerified

Show 4 more filings ↓up to 1d gap

California State AGbd_5e0a3bd92e5350802026-04-17 · +1dVerified
Vermont State AGbd_869dab11152c8f642026-04-17 · +1dVerified
Maine State AGbd_b58902d8252995392026-04-17 · +1dVerified
Washington State AGbd_e65e6ed6cee144582026-04-17 · +1dVerified

Name: Alaska Air Group Federal Credit Union
norm: alaska air group federal credit union

Name: Alaska Air Group Federal Credit Union
norm: alaska air group federal credit union
Industry: Financial Servicesllm

Discovered: —
Breach occurred: Mar 5, 2026
Materiality determined: —
Notification sent: Apr 16, 2026
Affected individuals: 86state-resident count only
Data types: Government IDIdentity (basic)Financial account
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1195 Supply Chain Compromise
Threat actor: External
Initial access: supply_chain

During the incident: Initiated an investigation with the assistance of cybersecurity experts
Resecured AAGCU’s IT environment
Conducted a detailed review of the potentially affected files
Retained industry-leading cybersecurity experts to support our investigation and response
Changes made: Offering complimentary access to 24 months of credit monitoring services through Experian
Deploy the level of robust security protocols, continuous monitoring, and staff training
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 · 9 filings · 9 states

View merged incident ↗

Indiana State AGApr 16 · first

New Hampshire State AGApr 16 · first

Montana State AGApr 16 · first · this page

Oregon State AG+1d

Massachusetts State AG+1d

California State AG+1d

Vermont State AG+1d

Maine State AG+1d

Washington 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://dojmt.gov/wp-content/uploads/2026/09/Consumer-notification-letter-10.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Apr 16, 2026
Raw hash: 9270ddc6f370c67bd53e57ded2581fec5fd7e3748053d49420e7091d25d96d69

Linked disclosures

Regulatory filings (8) · sorted by filing gap

Reporting entityAlaska Air Group Federal Credit Union

Victim entityAlaska Air Group Federal Credit Union

IncidentThird-Party / Supply Chain

Stated responseInitiated an investigation with the assistance of cybersecurity experts

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov