HackingProfessional ServicesProfessional ServicesStolen CredentialsData ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDHighContained

Tarter Krinsky & Drogin LLP

bd_15f21ff79b011217 · schema v1 · pii pii-v1

Severity

High

Discovered

Sep 10, 2025

Filed

Jun 5, 2026

To disclose

38 weeks

Affected

1,268state residents only

Linked

9 filings

Confidence

66%

Full breach record for Tarter Krinsky & Drogin LLP →

Tarter Krinsky & Drogin LLP (TKD) reported a data event to the New Hampshire Attorney General on June 5, 2026. Unauthorized access occurred between July 9, 2025, and September 9, 2025, affecting 1,268 New Hampshire residents. Exposed data included names and Social Security numbers. TKD engaged forensic specialists, notified federal law enforcement, and provided 12 months of credit monitoring via TransUnion to affected individuals.

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Incident timeline

undetected · 63 days

discovery → filing · 38 weeks / 268 days

Jul 9, 2025

Begins

Sep 10, 2025

Discovered

Jun 5, 2026

Filed

vs. sector median

+19 wks slower

This filing is one of 9 filings about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (8) · sorted by filing gap

Indiana State AGbd_18d9db7ac1e2d5f02026-06-05Verified
Maine State AGbd_84538679dc6bce762026-06-05Verified
Vermont State AGbd_89096b1050df0c002026-06-05Verified
Massachusetts State AGbd_94f22eccb22dcf5d2026-06-05Candidate

Show 4 more filings ↓up to 102d gap

Texas State AGbd_cea9ee41460cd42d2026-06-09 · +4dVerified
California State AGbd_0f270b92e68782272026-09-15 · +102dVerified
HHS OCRbd_42a43f03c9a492852026-09-15 · +102dVerified
New Hampshire State AGbd_718a78f94dfa7fc22026-09-15 · +102dVerified

Name: Mullen Coughlin LLC
norm: mullen coughlin

Name: Tarter Krinsky & Drogin LLP
norm: tarter krinsky drogin
Domain: tarterkrinsky.com
Industry: professional_services
Industry: Professional Servicesllm

Discovered: Sep 10, 2025
Breach occurred: Jul 9, 2025 – Sep 9, 2025
Undetected for: 63 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jun 5, 2026
Affected individuals: 1,268state-resident count only
Data types: Identity (basic)Government ID
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1078 Valid Accounts
Threat actor: External
Regulator citations: Notified federal law enforcement regarding the eventProviding written notice of this incident to relevant state regulators, as necessary, and to the three major credit reporting agencies, Equifax, Experian, and TransUnion
Initial access: valid_credentials

During the incident: Launched an investigation into the nature and scope of the activity with the assistance of third-party forensic specialists
Undertook a comprehensive review of the affected files, with the assistance of third-party subject matter specialists
Notified individuals whose data was contained in the potentially impacted files
Notified federal law enforcement regarding the event
Provided substitute notice to individuals that it did not have contact information for by posting notice to TKD’s website and notifying major statewide media
Providing access to credit monitoring services for twelve (12) months, through TransUnion, to individuals whose personal information was potentially affected by this incident, at no cost to these individuals
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, as necessary, and to the three major credit reporting agencies, Equifax, Experian, and TransUnion
Changes made: Reviewing existing security policies
Implemented additional measures to further protect against similar incidents moving forwards, including additional safeguards and training to its employees
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 38 weeks(268 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 9 filings · 8 states

View merged incident ↗

Indiana State AGJun 5 · first

Maine State AGJun 5 · first

Vermont State AGJun 5 · first

Massachusetts State AGJun 5 · first

New Hampshire State AGJun 5 · first · this page

Texas State AG+4d

California State AG+102d

HHS OCR+102d

New Hampshire State AG+102d

Pattern: first filing Jun 5 (IN), last Sep 15 (NH) — a 102-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

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/tarter-krinsky-drogin-20260605.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jun 5, 2026
Raw hash: 97573b192f1eb3de4579a126d57f352c862283c09d7a13b8f935c2382350a119

Linked disclosures

Regulatory filings (8) · sorted by filing gap

Reporting entityMullen Coughlin LLC

Victim entityTarter Krinsky & Drogin LLP

Incidentdiscovered Sep 10, 2025

Stated responseLaunched an investigation into the nature and scope of the activity with the assistance of third-party forensic specialists

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov