HackingProfessional ServicesProfessional ServicesStolen CredentialsData ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDFinancial accountMediumContained

Cornick, Garber & Sandler, LLP

bd_52c60a4fef5e9059 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Mar 12, 2026

Filed

Apr 9, 2026

To disclose

28 days

Affected

14state residents only

Linked

6 filings

Confidence

66%

Full breach record for Cornick, Garber & Sandler, LLP →

Cornick, Garber & Sandler, LLP, a law firm, notified the New Hampshire Attorney General of a data security incident affecting 14 state residents. Unauthorized access occurred between February 14, 2025, and March 26, 2025. The firm discovered the breach on March 12, 2026, after a forensic investigation. Personal information exposed included names, driver's licenses, account/routing numbers, taxpayer IDs, and Social Security numbers. Notifications to residents began April 2, 2026, offering one year of credit monitoring via Kroll.

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Incident timeline

undetected · 391 days

discovery → filing · 28 days

Feb 14, 2025

Begins

Mar 12, 2026

Discovered

Apr 9, 2026

Filed

vs. sector median

15 wks faster

This filing is one of 6 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (5) · sorted by filing gap

Massachusetts State AGbd_95f8996488fce7522026-04-03 · +6dVerified
Indiana State AGbd_003fb8e44b24511d2026-04-02 · +7dCandidate
Maine State AGbd_578603a2b21a46242026-04-02 · +7dVerified
Massachusetts State AGbd_5b5d30c080dcd3472026-05-14 · +35dVerified

Show 1 more filing ↓up to 35d gap

Indiana State AGbd_e54f16f231e0f0b42026-05-14 · +35dVerified

Name: MCDONALD HOPKINS LLC
norm: mcdonald hopkins

Name: Cornick, Garber & Sandler, LLP
norm: cornick garber sandler
Industry: Professional Servicesllm

Discovered: Mar 12, 2026
Breach occurred: Feb 14, 2025 – Mar 26, 2025
Undetected for: 391 daysoccurrence → discovery
Materiality determined: —
Notification sent: Apr 2, 2026
Affected individuals: 14state-resident count only
Data types: Identity (basic)Government IDFinancial account
Data elements: Social Security number
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Regulator citations: Notification to New Hampshire Attorney General Consumer Protection Bureau
Initial access: valid_credentials

During the incident: Commenced an immediate and thorough investigation
Worked to identify what personal information, if any, might have been present in the accessed systems
Following a forensics investigation and complex manual document review
Notified law enforcement
Engaged external cybersecurity professionals
Offering affected residents whose Social Security number was potentially involved with complimentary one-year memberships with a credit monitoring service
Changes made: Continually evaluates and modifies its practices to enhance the security and privacy of the personal information it maintains
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 28 days(28 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 6 filings · 4 states

View merged incident ↗

Indiana State AGApr 2 · first

Maine State AGApr 2 · first

Massachusetts State AG+1d

New Hampshire State AG+7d · this page

Massachusetts State AG+42d

Indiana State AG+42d

Pattern: first filing Apr 2 (IN), last May 14 (IN) — a 42-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/cornick-garber-sandler-20260409.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Apr 9, 2026
Raw hash: 5394c49e2ebb2e8286507b5a85137ea1fc5e23906131f07aa2d967fa6581a3ef

Linked disclosures

Regulatory filings (5) · sorted by filing gap

Reporting entityMCDONALD HOPKINS LLC

Victim entityCornick, Garber & Sandler, LLP

Incidentdiscovered Mar 12, 2026

Stated responseCommenced an immediate and thorough investigation

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov