HackingProfessional ServicesProfessional ServicesCustomer Data InvolvedIdentity (basic)Government IDMediumContained

Dan Clasby Company, CPAS

bd_2d656db346150f00 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Sep 3, 2025

Filed

Dec 29, 2025

To disclose

17 weeks

Affected

3state residents only

Linked

3 filings

Confidence

67%

Full breach record for Dan Clasby Company, CPAS →

Dan Clasby Company, CPAS reported a data security incident to the New Hampshire Attorney General on December 29, 2025. The company discovered a network disruption on September 3, 2025, leading to unauthorized access to files containing names and Social Security numbers of 3 New Hampshire residents. Notifications were sent on December 26, 2025, offering complimentary identity monitoring services.

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Incident timeline

discovery → filing · 17 weeks / 117 days

Sep 3, 2025

Discovered

Dec 29, 2025

Filed

vs. sector median

2 wks faster

This filing is one of 3 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (2) · sorted by filing gap

Massachusetts State AGbd_64c3750e084bda002025-12-30 · +1dVerified
Vermont State AGbd_12d0d638db3dd5862025-12-26 · +3dCandidate

Name: Dan Clasby Company, CPAS
norm: dan clasby company cpas

Name: Dan Clasby Company, CPAS
norm: dan clasby company cpas
Industry: Professional Servicesllm

Discovered: Sep 3, 2025
Materiality determined: —
Notification sent: Dec 26, 2025
Affected individuals: 3state-resident count only
Data types: Identity (basic)Government ID
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing Application
Threat actor: External
Regulator citations: Notified New Hampshire Attorney General
Initial access: exploit_public_facing

During the incident: Engaged independent cybersecurity experts
Secured its network environment
Launched an investigation
Implemented measures to enhance the security of its environment
Offered access to complimentary identity monitoring services
Established a toll-free call center through TransUnion
Changes made: Implemented measures to enhance the security of its environment in an effort to minimize the risk of a similar incident occurring in the future
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 17 weeks(117 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 3 filings · 3 states

View merged incident ↗

Vermont State AGDec 26 · first

New Hampshire State AG+3d · this page

Massachusetts State AG+4d

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://mm.nh.gov/files/uploads/doj/remote-docs/dan-clasby-20251229.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 29, 2025
Raw hash: e3975f8392fe77dfe27d5535cd84fafd5ca45f0b61e8af0ebc9e8ec7e5b118f6

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityDan Clasby Company, CPAS

Victim entityDan Clasby Company, CPAS

Incidentdiscovered Sep 3, 2025

Stated responseEngaged independent cybersecurity experts

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov