HackingHealthcareFinancial ServicesHealthcareCustomer Data InvolvedEmployee Data InvolvedIdentity (basic)Government IDHealth (basic)MinorMediumContained

Trusteed Plan Services Corporation

bd_e877db61aece8a95 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Dec 26, 2024

Filed

Sep 15, 2025

To disclose

38 weeks

Affected

Not disclosed

Linked

10 filings

Confidence

64%

Full breach record for Trusteed Plan Services Corporation →

Trusteed Plans Service Corporation (TPSC) detected unauthorized access to its computer environment on December 26, 2024. An unauthorized user gained access and obtained personal information, including names, addresses, dates of birth, and Social Security numbers, of plan participants, their children, and deceased individuals. TPSC engaged third-party cybersecurity firms, disconnected network access, and changed credentials. The company is offering 12 months of cyber or credit monitoring services to affected individuals. No evidence of misuse has been found.

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California clockDiscovered Dec 26, 2024 → Notified Sep 15, 2025263d ✗ CA 60-day late38 weeks discovery → filing

Incident timeline

discovery → filing · 38 weeks / 263 days

Dec 26, 2024

Begins

Dec 26, 2024

Discovered

Sep 15, 2025

Filed

vs. sector median

+27 wks slower

This filing is one of 10 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (9) · sorted by filing gap

Maine State AGbd_239543df911e11ae2025-09-15Verified
Oregon State AGbd_2784da27b9d225032025-09-15Verified
Montana State AGbd_2fd6c2009f8f2fd32025-09-15Verified
Washington State AGbd_4bf1c9fac6cb92602025-09-15Verified

Show 5 more filings ↓up to 7d gap

Indiana State AGbd_7865db4bd7dd399f2025-09-15Verified
Nebraska State AGbd_7c306950c9a0e7632025-09-15Verified
Massachusetts State AGbd_24e85d893faf6a722025-09-16 · +1dVerified
HHS OCRbd_447f5e820983570c2025-09-17 · +2dVerified
New Hampshire State AGbd_6bb953f8b0288db22025-09-22 · +7dVerified

Name: Trusteed Plan Services Corporation
norm: trusteed plan

Name: Trusteed Plan Services Corporation
norm: trusteed plan
Industry: HealthcarellmFinancial Servicesllm

Discovered: Dec 26, 2024
Breach occurred: Dec 26, 2024
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: Sep 15, 2025
Affected individuals: Not disclosed
Data types: Identity (basic)Government IDHealth (basic)Minor
Attack vector: Unknown
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External

During the incident: Engaged a specialized third-party cybersecurity firm to secure its computer systems and conduct a comprehensive investigation
Disconnected all access to our network
Changed administrative credentials
Restored operations in a safe and secure mode
Enhanced the security measures
Changes made: Providing access to Cyber Monitoring services for 12 months at no charge
Providing access to Single Bureau Credit Monitoring/Single Bureau Credit Report/Single Bureau Credit Score services at no charge
Providing proactive fraud assistance
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 38 weeks(263 days from discovery to filing)
Compliance flags: CA 60-day late · 263d
Discovery-date grounding: letter-groundedThe discovery date is the detection date narrated in the notification letter — the defensible tier.
Clock breakdown: Statute Window Elapsed Threshold Status
California
Discovered: Dec 26, 2024
→ Notified: Sep 15, 2025
263d 60 days (analyst band, pre-2026 discoveries) CA 60-day late

Statute	Window	Elapsed	Threshold	Status
California	Discovered: Dec 26, 2024 → Notified: Sep 15, 2025	263d	60 days (analyst band, pre-2026 discoveries)	CA 60-day late

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 10 filings · 9 states

View merged incident ↗

Maine State AGSep 15 · first

Oregon State AGSep 15 · first

Montana State AGSep 15 · first

Washington State AGSep 15 · first

Indiana State AGSep 15 · first

Nebraska State AGSep 15 · first

California State AGSep 15 · first · this page

Massachusetts State AG+1d

HHS OCR+2d

New Hampshire State AG+7d

Pattern: first filing Sep 15 (ME), last Sep 22 (NH) — a 7-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://oag.ca.gov/ecrime/databreach/reports/sb24-609991
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 15, 2025
Raw hash: a7cdbfa80594dbf4fcd5b049a61e5a1e75d9afd6e01ab9680f91b369e0e2c89d

Linked disclosures

Regulatory filings (9) · sorted by filing gap

Reporting entityTrusteed Plan Services Corporation

Victim entityTrusteed Plan Services Corporation

Incidentdiscovered Dec 26, 2024

Stated responseEngaged a specialized third-party cybersecurity firm to secure its computer systems and conduct a comprehensive investigation

ComplianceCA 60-day late

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov