UnknownGovernmentGovernmentGovernment IDMedium

Pierce County Library System

bd_2c869ac679841398 · schema v1 · pii pii-v1

Severity

Medium

Discovered

—

Filed

Dec 10, 2025

To disclose

—

Affected

8state residents only

Linked

6 records

Confidence

95%

Full breach record for Pierce County Library System →

Pierce County Library System reported a data breach to the Massachusetts Office of Consumer Affairs and Business Regulation. The breach was reported on 2025-12-10. 8 Massachusetts residents were affected.

J jump to incidentP pin to compareR raw source

Leak gap clock✗ Leak >180d

⚠ no discovery dateNo discovery date was extracted, so no notification clock can be evaluated.

Incident timeline — partial

? — ?

Breach window unknown

Dec 10, 2025

Filed

No interval is drawn: no breach start or discovery date is on record for this filing.

This filing is one of 6 records about the same incident.View merged incident

A leak claim by inc_ransom about this victim was first seen 202 days before this filing.View originating leak claim

Linked disclosures

Why this link?

Ransomware claims (1)

Leak Siteinc_ransombd_5b40e5aa1a010f512025-04-21 · +233dVerified by operator

Regulatory filings (4) · sorted by filing gap

Vermont State AGbd_71aaa1b316b7365c2025-12-09 · +1dCandidate
Maine State AGbd_a51f9d15cf7ff4ea2025-12-09 · +1dVerified
Indiana State AGbd_e342cc3aa5512dd52025-12-09 · +1dVerified
Washington State AGbd_13778595ed20da502025-06-20 · +173dVerified by operator

Name: Pierce County Library System
norm: pierce county library system
Domain: piercecountylibrary.org

Name: Pierce County Library System
norm: pierce county library system
Domain: piercecountylibrary.org
Industry: Governmentregulator portal

Discovered: —
Materiality determined: —
Notification sent: —
Affected individuals: 8state-resident count only
Data types: Government ID
Data elements: Social Security number
Stated not affected: Medical informationFinancial account numberDriver's licence numberPayment card number
The filing states these were not involved. Categories absent from both lists were not addressed either way.
Attack vector: Unknown

Compliance flags: Leak >180dMA credit monitoring due
Discovery-date grounding: no discovery dateNo discovery date was extracted, so no notification clock can be evaluated.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 5 filings · 5 states

View merged incident ↗

Washington State AGJun 20 · first

Vermont State AG+172d

Maine State AG+172d

Indiana State AG+172d

Massachusetts State AG+173d · this page

Pattern: first filing Jun 20 (WA), last Dec 10 (MA) — a 173-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://www.mass.gov/doc/data-breach-report-2025/download
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 10, 2025
Raw hash: 74f3c8820e8d966ca896ea4742858c5dd3a33a7b4fcb7f8e1a7aa1479cdcf3a2

Linked disclosures

Ransomware claims (1)

Regulatory filings (4) · sorted by filing gap

Reporting entityPierce County Library System

Victim entityPierce County Library System

IncidentUnknown

ComplianceLeak >180d

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov