HackingTechnologyInformationData ExfiltratedCustomer Data InvolvedIdentity (basic)Financial accountMediumContained

Sellmark Corporation

bd_481c301aa70aed91 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Aug 14, 2025

Filed

Sep 11, 2025

To disclose

28 days

Affected · nationwide

1,4081 in this filing

Linked

6 filings

Confidence

66%

Full breach record for Sellmark Corporation →

Sellmark Corporation experienced an external system breach (hacking) between March 10 and April 14, 2025. The incident was discovered on August 14, 2025. Unauthorized access resulted in the exfiltration of personal information, including names and payment card data, affecting 1,408 individuals total (1 Maine resident). Notification was sent on September 11, 2025.

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Maine clockDiscovered Aug 14, 2025 → Filed with AG Sep 11, 202528d ✓ ME AG ≤30d28 days discovery → filing

⚠ AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Incident timeline

undetected · 157 days

discovery → filing · 28 days

Mar 10, 2025

Begins

Aug 14, 2025

Discovered

Sep 11, 2025

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

Nebraska State AGbd_0defb7036f6160732025-09-11Verified
Indiana State AGbd_4e42db266ced1ff92025-09-11Verified
Massachusetts State AGbd_907eb546453cc0ac2025-09-11Verified
New Hampshire State AGbd_945f9c63c06c97532025-09-11Verified

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: Technologyllm

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: 1,408state + nationwide
Data types: Identity (basic)Financial account
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
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: ME AG ≤30d · 28d
Discovery-date grounding: AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.
Clock breakdown: Statute Window Elapsed Threshold Status
Maine
Discovered: Aug 14, 2025
→ Filed with AG: Sep 11, 2025
28d 30 days ME AG ≤30d

Statute	Window	Elapsed	Threshold	Status
Maine	Discovered: Aug 14, 2025 → Filed with AG: Sep 11, 2025	28d	30 days	ME AG ≤30d

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 6 filings · 6 states

View merged incident ↗

Nebraska State AGSep 11 · first

Indiana State AGSep 11 · first

Massachusetts State AGSep 11 · first

New Hampshire State AGSep 11 · first

Maine 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://www.maine.gov/agviewer/content/ag/985235c7-cb95-4be2-8792-a1252b4f8318/25cbb7f0-35d6-4618-8310-e642b98fcbc0.html
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: e9dc98fea904354dfe7a3bfdb2e7ee8539530469ce767e5741ed738e0a53cae9

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

ComplianceME AG ≤30d

Extraction provenanceno artifact recorded

Source provenancewww.maine.gov