HackingRetail & ConsumerRetailStolen CredentialsData ExfiltratedCustomer Data InvolvedGovernment IDIdentity (basic)Financial accountMediumContained

Sellmark Corporation

bd_945f9c63c06c9753 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Aug 14, 2025

Filed

Sep 11, 2025

To disclose

28 days

Affected

4state residents only

Linked

6 filings

Confidence

66%

Full breach record for Sellmark Corporation →

Sellmark Corporation notified the New Hampshire Attorney General of a cybersecurity incident involving unauthorized access to its network between March 10 and April 14, 2025. The breach affected four New Hampshire residents, exposing names, Social Security numbers, driver's license numbers, and financial account information. Sellmark secured its systems, engaged a cybersecurity firm, reported to law enforcement, and mailed notifications on September 11, 2025, offering one year of credit monitoring.

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Incident timeline

undetected · 157 days

discovery → filing · 28 days

Mar 10, 2025

Begins

Aug 14, 2025

Discovered

Sep 11, 2025

Filed

vs. sector median

3 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

Nebraska State AGbd_0defb7036f6160732025-09-11Verified
Maine State AGbd_481c301aa70aed912025-09-11Candidate
Indiana State AGbd_4e42db266ced1ff92025-09-11Verified
Massachusetts State AGbd_907eb546453cc0ac2025-09-11Verified

Show 1 more filing ↓up to 1d gap

Texas State AGbd_68aa45d2d7f88a2a2025-09-12 · +1dVerified by operator

Name: Sellmark Corporation
norm: sellmark

Name: Sellmark Corporation
norm: sellmark
Industry: Retail & Consumerllm

Discovered: Aug 14, 2025
Breach occurred: Mar 10, 2025 – Apr 14, 2025
Undetected for: 157 daysoccurrence → discovery
Materiality determined: —
Notification sent: Sep 11, 2025
Affected individuals: 4state-resident count only
Data types: Government IDIdentity (basic)Financial account
Data elements: Social Security number
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: reported the incident to law enforcement
Initial access: exploit_public_facing

During the incident: Took measures to secure its systems
Launched an investigation with the help of a cybersecurity firm
Reported the incident to law enforcement
Mailed a notification letter via U.S. First-Class mail
Offering one year of complimentary credit monitoring, fraud consultation, and identity theft restoration services
Established a dedicated, toll-free call center
Changes made: Implemented additional measures to enhance the security of its systems
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 · 6 states

View merged incident ↗

Nebraska State AGSep 11 · first

Maine State AGSep 11 · first

Indiana State AGSep 11 · first

Massachusetts State AGSep 11 · first

New Hampshire State AGSep 11 · first · this page

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://mm.nh.gov/files/uploads/doj/remote-docs/sellmark-20250911.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 11, 2025
Raw hash: aa0aed720405ed0c3f9809e995d299708641a7a3435074f6cf63572d918b0fcb

Linked disclosures

Regulatory filings (5) · sorted by filing gap

Reporting entitySellmark Corporation

Victim entitySellmark Corporation

Incidentdiscovered Aug 14, 2025

Stated responseTook measures to secure its systems

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov