HackingProfessional ServicesProfessional ServicesDelayed DiscoveryCustomer Data InvolvedIdentity (basic)Government IDFinancial accountMediumContained

Barton Gilman LLP

bd_14ec9c5b447c3242 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Sep 1, 2024

Filed

Dec 23, 2025

To disclose

16 months

Affected

9state residents only

Linked

5 filings

Confidence

66%

Full breach record for Barton Gilman LLP →

Barton Gilman LLP reported an external system breach (hacking) occurring between September 13 and 26, 2024. Unauthorized access resulted in the removal of personal information including names, driver's license numbers, SSNs, and financial account data. The firm discovered the activity in September 2024, notified federal law enforcement, and began notifying affected individuals in December 2025. 9 Maine residents were affected. Credit monitoring services were offered.

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Maine clockDiscovered Sep 1, 2024 → Filed with AG Dec 23, 2025478d ✗ ME AG >90d16 months discovery → filing

⚠ unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Incident timeline

Sep 13, 2024

Begins

Dec 23, 2025

Filed

vs. sector median

+51 wks slower

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

Linked disclosures

Why this link?

Regulatory filings (4) · sorted by filing gap

Vermont State AGbd_0923a90f1999f7462025-12-23Candidate
New Hampshire State AGbd_598fd2d5e12c9d542025-12-23Verified
Indiana State AGbd_6f242b5c4968fe202025-12-23Verified
Massachusetts State AGbd_43fc4dd61c86c5762025-12-24 · +1dVerified

Name: Barton Gilman LLP
norm: barton gilman
Domain: bglaw.com
Industry: Legal Services

Name: Barton Gilman LLP
norm: barton gilman
Domain: bglaw.com
Industry: Legal Services
Industry: Professional Servicesllm

Discovered: Sep 1, 2024
Breach occurred: Sep 13, 2024 – Sep 26, 2024
Materiality determined: —
Notification sent: Dec 23, 2025
Affected individuals: 9state-resident count only
Data types: Identity (basic)Government IDFinancial account
Data elements: Social Security numberDate of birth
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1078 Valid Accounts
Threat actor: ExternalFinancial
Regulator citations: Notified federal law enforcementProviding written notice of this incident to relevant state regulators
Initial access: exploit_public_facing

During the incident: Began working with third party resources to investigate the nature and scope of the event
Notified federal law enforcement regarding the event
Providing access to credit monitoring services for twelve (12) months through TransUnion
Providing impacted individuals with guidance on how to better protect against identity theft and fraud
Providing written notice of this incident to relevant state regulators
Providing written notice to the three major credit reporting agencies, Equifax, Experian, and TransUnion
Changes made: Implementing additional security measures to further protect against similar incidents occurring in the future
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 16 months(478 days from discovery to filing)
Compliance flags: ME AG >90d · 478dME resident >180d · 478d
Discovery-date grounding: unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.
Clock breakdown: Statute Window Elapsed Threshold Status
Maine
Discovered: Sep 1, 2024
→ Filed with AG: Dec 23, 2025
478d 90 days ME AG >90d
Maine
Discovered: Sep 1, 2024
→ Notified: Dec 23, 2025
478d 180 days ME resident >180d

Statute	Window	Elapsed	Threshold	Status
Maine	Discovered: Sep 1, 2024 → Filed with AG: Dec 23, 2025	478d	90 days	ME AG >90d
Maine	Discovered: Sep 1, 2024 → Notified: Dec 23, 2025	478d	180 days	ME resident >180d

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 5 filings · 5 states

View merged incident ↗

Vermont State AGDec 23 · first

New Hampshire State AGDec 23 · first

Indiana State AGDec 23 · first

Maine State AGDec 23 · 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://www.maine.gov/agviewer/content/ag/985235c7-cb95-4be2-8792-a1252b4f8318/ba0ec71e-501a-4899-99e9-01d9c60a1735.html
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 23, 2025
Raw hash: c7534880c0499445cf4a5372a89658d4e17b6e98612fdc93129d99081127a523

Linked disclosures

Regulatory filings (4) · sorted by filing gap

Reporting entityBarton Gilman LLP

Victim entityBarton Gilman LLP

Incidentdiscovered Sep 1, 2024

Stated responseBegan working with third party resources to investigate the nature and scope of the event

ComplianceME AG >90d

Extraction provenanceno artifact recorded

Source provenancewww.maine.gov