HackingFinancial ServicesFinanceStolen CredentialsCustomer Data InvolvedFinancial accountIdentity (basic)Government IDPIIMediumContained

EDUCATIONAL EMPLOYEES CREDIT UNION

bd_15b461a85b8b7df7 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Dec 15, 2025

Filed

May 29, 2026

To disclose

24 weeks

Affected

34state residents only

Linked

5 filings

Confidence

64%

Full breach record for EDUCATIONAL EMPLOYEES CREDIT UNION →

Educational Employees Credit Union notified members that an unauthorized individual accessed one employee email account on December 15, 2025. The organization secured the email environment and engaged cybersecurity professionals. A review completed on May 8, 2026, determined certain emails contained personal information. The organization is offering two years of complimentary identity monitoring through Kroll.

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Massachusetts clock✗ MA AG >90d24 weeks discovery → filing

Incident timeline

discovery → filing · 24 weeks / 165 days

Dec 15, 2025

Begins

Dec 15, 2025

Discovered

May 29, 2026

Filed

vs. sector median

+15 wks slower

This filing is one of 5 filings about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (4) · sorted by filing gap

Nebraska State AGbd_4c3b656dd5b5443a2026-05-29Verified
California State AGbd_6b3e06557a4d06e62026-05-29Verified
Montana State AGbd_78e4ebc6abee40f32026-05-29Verified
Texas State AGbd_d4e3d38742b461e12026-06-01 · +3dVerified by operator

Name: EDUCATIONAL EMPLOYEES CREDIT UNION
norm: educational employees credit union

Name: EDUCATIONAL EMPLOYEES CREDIT UNION
norm: educational employees credit union
Industry: Financial Servicesllm

Discovered: Dec 15, 2025
Breach occurred: Dec 15, 2025
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: May 29, 2026
Affected individuals: 34state-resident count only
Data types: Financial accountIdentity (basic)Government IDPII
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1114 Email Collection
Threat actor: External
Initial access: valid_credentials

During the incident: Immediately secured our email environment
Commenced a prompt and thorough investigation assisted by cybersecurity professionals experienced in handling these types of incidents
Conducted a thorough and comprehensive review of the impacted email account
Changes made: Continually evaluate and modify our practices and internal controls to enhance the security and privacy of your personal information
Providing complimentary identity monitoring services with Kroll for a period of two years
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 24 weeks(165 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 · 5 filings · 5 states

View merged incident ↗

Nebraska State AGMay 29 · first

California State AGMay 29 · first

Montana State AGMay 29 · first

Massachusetts State AGMay 29 · first · this page

Texas State AG+3d

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/2026-878-educational-employees-credit-union/download
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: May 29, 2026
Raw hash: 669002c4a6f8ed0bf2e764aaa3a1a6a37c3ab8c9f194c32cede4d31befb11225

Linked disclosures

Regulatory filings (4) · sorted by filing gap

Reporting entityEDUCATIONAL EMPLOYEES CREDIT UNION

Victim entityEDUCATIONAL EMPLOYEES CREDIT UNION

Incidentdiscovered Dec 15, 2025

Stated responseImmediately secured our email environment

ComplianceMA AG >90d

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov