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

Thompson & Horton LLP

bd_2920937e52182148 · schema v1 · pii pii-v2

Severity

Low

Discovered

May 3, 2024

Filed

Oct 29, 2025

To disclose

—

Affected

Not disclosed

Linked

8 filings

Confidence

65%

Full breach record for Thompson & Horton LLP →

Thompson & Horton, LLP notified affected individuals of a cybersecurity incident involving unauthorized access to a server hosted by their managed IT services provider, All Covered. The breach occurred between April 13, 2024, and May 3, 2024. The firm engaged forensic specialists, notified law enforcement, and provided 24 months of credit monitoring. The incident involved names of individuals across multiple states.

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Incident timeline

undetected · 20 days

Apr 13, 2024

Begins

May 3, 2024

Discovered

Oct 29, 2025

Filed

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

Montana State AGbd_62dd0345ed0ce4652025-10-29Candidate
New Hampshire State AGbd_68dca34fb6031c4d2025-10-29Verified
Indiana State AGbd_b344e037d355f1a02025-10-29Verified
Vermont State AGbd_ca2da2865ef941c22025-10-29Verified

Show 3 more filings ↓up to 1d gap

Maine State AGbd_2460f839b22fc5042025-10-30 · +1dVerified
Massachusetts State AGbd_67012f31f4f0f1c02025-10-30 · +1dVerified
Texas State AGbd_71c2bdcabc3a48a72025-10-30 · +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: Not disclosed
Data types: Identity (basic)
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1195 Supply Chain Compromise
Threat actor: External
Third party: via All Covered (Managed IT Services Provider)
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 services for 24 months provided by Cyberscout
Changes made: Provided 24 months of complimentary credit monitoring services through Cyberscout (a TransUnion company)
Source: Quoted from the filing itself, not independently verified.

Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 8 filings · 8 states

View merged incident ↗

Montana State AGOct 29 · first

New Hampshire State AGOct 29 · first

Indiana State AGOct 29 · first

Vermont State AGOct 29 · first

Nebraska State AGOct 29 · first · this page

Maine State AG+1d

Massachusetts State AG+1d

Texas 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://nebraska.gov/ago/data-breach/documents/bb4c26c7-1b4b-4087-9ece-7351ef1e0df0.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Oct 29, 2025
Raw hash: 9f33281f311d44b9c8b6326e6e40d79de36373a4431f4a2144ed7517186b7b6b

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

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancenebraska.gov