HackingEducationEducationData ExfiltratedCustomer Data InvolvedIdentity (basic)LowContained

Pierce County Library System

bd_71aaa1b316b7365c · schema v1 · pii pii-v1

Severity

Low

Discovered

—

Filed

Dec 9, 2025

To disclose

—

Affected

1state residents only

Linked

6 filings

Confidence

68%

Full breach record for Pierce County Library System →3 incidents on file

Pierce County Library System experienced unauthorized access to its systems between April 15 and April 21, 2025, during which certain files were copied and taken. The organization secured its systems and investigated the incident. A review completed on October 10, 2025, determined that personal information, including names, was involved. Approximately one Rhode Island resident was affected. The organization is offering complimentary credit monitoring and identity protection services.

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Leak gap clock✗ Leak >180d

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

Incident timeline

Apr 15, 2025

Begins

Dec 9, 2025

Filed

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

Linked disclosures

Why this link?

Ransomware claims (2)

Leak Siteinc_ransombd_5b40e5aa1a010f512025-04-21 · +232dVerified
Leak Siteinc_ransombd_0b3e1f1fba96601d2025-04-18 · +235dVerified by operator

Regulatory filings (3) · sorted by filing gap

Maine State AGbd_a51f9d15cf7ff4ea2025-12-09Verified
Indiana State AGbd_e342cc3aa5512dd52025-12-09Verified
Massachusetts State AGbd_2c869ac6798413982025-12-10 · +1dVerified 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: Educationllm

Discovered: —
Breach occurred: Apr 15, 2025 – Apr 21, 2025
Materiality determined: —
Notification sent: Dec 9, 2025
Affected individuals: 1state-resident count only
Data types: Identity (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1041 Exfiltration Over C2 Channel
Threat actor: External

During the incident: Promptly took steps to secure our systems
Initiated an investigation into the nature and scope of the event
Undertook a thorough review of the impacted systems to determine what information was present and to whom it relates
Offering access to complimentary credit monitoring and identity protection services through IDX at no cost
Source: Quoted from the filing itself, not independently verified.

Compliance flags: Leak >180d
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 · 4 filings · 4 states

View merged incident ↗

Maine State AGDec 9 · first

Indiana State AGDec 9 · first

Vermont State AGDec 9 · first · this page

Massachusetts 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://ago.vermont.gov/document/2025-12-09-pierce-county-library-system-data-breach-notice-consumers
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 9, 2025
Raw hash: 08f8cc1e2c1c63d697acf3b59d5d465f1deaf9ec0ead11447dddde9436bb2306

Linked disclosures

Ransomware claims (2)

Regulatory filings (3) · sorted by filing gap

Reporting entityPierce County Library System

Victim entityPierce County Library System

IncidentUnauthorized Access

Stated responsePromptly took steps to secure our systems

ComplianceLeak >180d

Extraction provenanceno artifact recorded

Source provenanceago.vermont.gov