HackingProfessional ServicesProfessional ServicesStolen CredentialsCustomer Data InvolvedIdentity (basic)Government IDMediumContained

Sherr CPA, LLC

bd_b97e79da3c02a9f2 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Apr 27, 2026

Filed

Jul 14, 2026

To disclose

11 weeks

Affected

1state residents only

Confidence

66%

Full breach record for Sherr CPA, LLC →

Sherr CPA, LLC reported a data event to the New Hampshire Attorney General on July 14, 2026. An unauthorized individual accessed a single email account between March 24 and April 27, 2026, potentially exposing one NH resident's name, address, and SSN. Sherr engaged forensic specialists, notified law enforcement, and provided one year of credit monitoring via Epiq.

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Incident timeline

undetected · 34 days

discovery → filing · 11 weeks / 78 days

Mar 24, 2026

Begins

Apr 27, 2026

Discovered

Jul 14, 2026

Filed

vs. sector median

3 wks faster

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed1 affectedView incident

Name: Mullen Coughlin LLC
norm: mullen coughlin

Name: Sherr CPA, LLC
norm: sherr cpa
Industry: Professional Servicesllm

Discovered: Apr 27, 2026
Breach occurred: Mar 24, 2026 – Apr 27, 2026
Undetected for: 34 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jul 14, 2026
Affected individuals: 1state-resident count only
Data types: Identity (basic)Government ID
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Regulator citations: Notified Office of the New Hampshire Attorney General
Initial access: valid_credentials

During the incident: Launched an investigation, with the assistance of third-party forensic specialists
Conducted a review of the potentially accessed data
Provided notification to potentially impacted individuals and your office
Notified federal law enforcement regarding the event
Providing access to credit monitoring services for one (1) year, through Epiq
Changes made: Working to implement additional safeguards and training to its employees
Providing impacted individuals with guidance on how to better protect against identity theft and fraud
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 11 weeks(78 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

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/sherr-cpa-20260714.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jul 14, 2026
Raw hash: cfab38fb1e4a353876508532b470f5a8d653ea962727f22bf338802dc9a797f1

Reporting entityMullen Coughlin LLC

Victim entitySherr CPA, LLC

Incidentdiscovered Apr 27, 2026

Stated responseLaunched an investigation, with the assistance of third-party forensic specialists

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov