HackingProfessional ServicesProfessional ServicesData ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDMediumContained

Civil Service Employees Association, Inc., Local 1000

bd_e3b1d074b1f89aaf · schema v1 · pii pii-v1

Severity

Medium

Discovered

May 30, 2025

Filed

Jan 20, 2026

To disclose

34 weeks

Affected

29state residents only

Linked

4 filings

Confidence

65%

Full breach record for Civil Service Employees Association, Inc., Local 1000 →

Civil Service Employees Association (CSEA) experienced a cybersecurity incident where an unauthorized party accessed systems between May 3 and May 31, 2025. The breach was discovered on May 30, 2025. Affected data includes names and Social Security Numbers. CSEA contained the incident, engaged forensic investigators, and is offering 24 months of credit monitoring.

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Massachusetts clock✗ MA AG >90d34 weeks discovery → filing

Incident timeline

undetected · 27 days

discovery → filing · 34 weeks / 235 days

May 3, 2025

Begins

May 30, 2025

Discovered

Jan 20, 2026

Filed

vs. sector median

+16 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

Maine State AGbd_302889683ab05c6d2026-01-20Candidate
Indiana State AGbd_3a7f8cfb83f1bfff2026-01-20Verified
Vermont State AGbd_3c33615cec86aa282026-01-20Verified

Name: Civil Service Employees Association, Inc., Local 1000
norm: civil service employees association inc local 1000

Name: Civil Service Employees Association, Inc., Local 1000
norm: civil service employees association inc local 1000
Industry: Professional Servicesllm

Discovered: May 30, 2025
Breach occurred: May 3, 2025 – May 31, 2025
Undetected for: 27 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jan 16, 2026
Affected individuals: 29state-resident count only
Data types: Identity (basic)Government ID
Attack vector: Unknown
MITRE ATT&CK: T1078 Valid AccountsT1041 Exfiltration Over C2 Channel
Threat actor: External
Regulator citations: Reporting the Incident to relevant government agencies

During the incident: Took systems offline
Changed passwords
Deployed advanced security and detection software
Securely restored systems from backups
Engaged leading cybersecurity professionals to assist with our investigation and response
Reporting the Incident to relevant government agencies
Changes made: Implemented additional measures to further improve the security of our systems and practices
Offering complimentary access to Experian IdentityWorks for 24 months
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 34 weeks(235 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 ↗

Maine State AGJan 20 · first

Indiana State AGJan 20 · first

Vermont State AGJan 20 · first

Massachusetts State AGJan 20 · first · 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/2026-84-civil-service-employees-association-inc-local-1000-afscme-afl-cio/download
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jan 20, 2026
Raw hash: 208b0fc7f67d971f5c9345774f807c5e5ca9b66c1369f73b2255e7e78cecd3f5

Linked disclosures

Regulatory filings (3) · sorted by filing gap

Reporting entityCivil Service Employees Association, Inc., Local 1000

Victim entityCivil Service Employees Association, Inc., Local 1000

Incidentdiscovered May 30, 2025

Stated responseTook systems offline

ComplianceMA AG >90d

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov