HackingProfessional ServicesProfessional ServicesSupply Chain (3P Vendor)Customer Data InvolvedIdentity (basic)LowContained

Thompson & Horton LLP

bd_2460f839b22fc504 · schema v1 · pii pii-v1

Severity

Low

Discovered

May 3, 2024

Filed

Oct 30, 2025

To disclose

18 months

Affected

3state residents only

Linked

8 filings

Confidence

66%

Full breach record for Thompson & Horton LLP →

Thompson & Horton LLP reported a data breach affecting 3 Maine residents. Unauthorized access occurred to a server hosted by MSP 'All Covered' between April 13 and May 3, 2024. The firm discovered the incident on May 3, 2024, and notified individuals on October 29, 2025. Affected data included names. The firm engaged forensic specialists, notified law enforcement, and provided 24 months of credit monitoring.

J jump to incidentP pin to compareR raw source

Maine clockDiscovered May 3, 2024 → Filed with AG Oct 30, 2025545d ✗ ME AG >90d18 months discovery → filing

Incident timeline

undetected · 20 days

discovery → filing · 18 months / 545 days

Apr 13, 2024

Begins

May 3, 2024

Discovered

Oct 30, 2025

Filed

vs. sector median

+60 wks slower

This filing is one of 8 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (7) · sorted by filing gap

Massachusetts State AGbd_67012f31f4f0f1c02025-10-30Verified
Texas State AGbd_71c2bdcabc3a48a72025-10-30Verified
Nebraska State AGbd_2920937e521821482025-10-29 · +1dVerified
Montana State AGbd_62dd0345ed0ce4652025-10-29 · +1dCandidate

Show 3 more filings ↓up to 1d gap

New Hampshire State AGbd_68dca34fb6031c4d2025-10-29 · +1dVerified
Indiana State AGbd_b344e037d355f1a02025-10-29 · +1dVerified
Vermont State AGbd_ca2da2865ef941c22025-10-29 · +1dVerified

Name: Thompson & Horton LLP
norm: thompson horton

Name: Thompson & Horton LLP
norm: thompson horton
Industry: Professional Servicesllm

Discovered: May 3, 2024
Breach occurred: Apr 13, 2024 – May 3, 2024
Undetected for: 20 daysoccurrence → discovery
Materiality determined: —
Notification sent: Oct 29, 2025
Affected individuals: 3state-resident count only
Data types: Identity (basic)
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1195 Supply Chain Compromise
Threat actor: External
Regulator citations: Filed notification with Maine Attorney General
Third party: via All Covered
Initial access: supply_chain

During the incident: Engaged third-party forensic specialists to investigate
Notified federal law enforcement
Reviewed policies and procedures
Arranged for complimentary credit monitoring service for 24 months provided by Cyberscout
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 18 months(545 days from discovery to filing)
Compliance flags: ME AG >90d · 545dME resident >180d · 544d
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
Maine
Discovered: May 3, 2024
→ Filed with AG: Oct 30, 2025
545d 90 days ME AG >90d
Maine
Discovered: May 3, 2024
→ Notified: Oct 29, 2025
544d 180 days ME resident >180d

Statute	Window	Elapsed	Threshold	Status
Maine	Discovered: May 3, 2024 → Filed with AG: Oct 30, 2025	545d	90 days	ME AG >90d
Maine	Discovered: May 3, 2024 → Notified: Oct 29, 2025	544d	180 days	ME resident >180d

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 8 filings · 8 states

View merged incident ↗

Nebraska State AGOct 29 · first

Montana State AGOct 29 · first

New Hampshire State AGOct 29 · first

Indiana State AGOct 29 · first

Vermont State AGOct 29 · first

Massachusetts State AG+1d

Texas State AG+1d

Maine State AG+1d · 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.maine.gov/agviewer/content/ag/985235c7-cb95-4be2-8792-a1252b4f8318/81a6de91-4348-4f75-9d65-f5ec8f67939c.html
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Oct 30, 2025
Raw hash: a3f12fd58d1796ec48b9bdb2890df6a5f2055296b3ea0fa40451457eaed13554

Linked disclosures

Regulatory filings (7) · sorted by filing gap

Reporting entityThompson & Horton LLP

Victim entityThompson & Horton LLP

Incidentdiscovered May 3, 2024

Stated responseEngaged third-party forensic specialists to investigate

ComplianceME AG >90d

Extraction provenanceno artifact recorded

Source provenancewww.maine.gov