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

CORPORATION SERVICE COMPANY

bd_18acd743a8c915ad · schema v1 · pii pii-v1

Severity

Medium

Discovered

—

Filed

Aug 13, 2026

To disclose

—

Affected

61state residents only

Linked

7 filings

Confidence

66%

Full breach record for CORPORATION SERVICE COMPANY →2 incidents on file

Corporation Service Company (CSC) notified the NH Attorney General of unauthorized access to a third-party hosted database between August 10-25, 2025. Data was copied and taken. A review completed on July 15, 2026, confirmed that information for 61 New Hampshire residents was involved, including names, SSNs, financial account info, EINs, and driver's license numbers. Notices were sent on August 13, 2026. CSC is offering 12 months of credit monitoring.

J jump to incidentP pin to compareR raw source

Incident timeline

Aug 10, 2025

Begins

Aug 13, 2026

Filed

This filing is one of 7 filings about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (6) · sorted by filing gap

Indiana State AGbd_2e59204d2f6bad2e2026-08-13Verified
California State AGbd_a3800fdb6c97e0dc2026-08-13Verified
Massachusetts State AGbd_b124658ed9aea1e52026-08-13Verified
Vermont State AGbd_eea5a7585b1a7acd2026-08-13Candidate

Show 2 more filings ↓up to 12d gap

Texas State AGbd_f81c597533fb2d442026-08-14 · +1dVerified
Illinois State AGbd_f8817df2ada5e6a62026-08-01 · +12dVerified

Name: Corporation Service Company
norm: corporation service company

Name: CORPORATION SERVICE COMPANY
norm: corporation service
Industry: Professional Servicesllm

Discovered: —
Breach occurred: Aug 10, 2025 – Aug 25, 2025
Materiality determined: —
Notification sent: Aug 13, 2026
Affected individuals: 61state-resident count only
Data types: Identity (basic)Government IDFinancial account
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1041 Exfiltration Over C2 Channel
Threat actor: External
Regulator citations: Notified Office of the New Hampshire Attorney General

During the incident: Launched an investigation with the assistance of third-party forensic specialists
Engaged a third party to conduct a comprehensive review of the information at risk
Providing access to credit monitoring services for twelve (12) months, through TransUnion
Providing impacted individuals with guidance on how to better protect against identity theft and fraud
Providing written notice of this incident to relevant regulators
Providing written notice to the three major credit reporting agencies, Equifax, Experian, and TransUnion
Changes made: Implemented additional safeguards
Reviewed policies and procedures relating to data privacy and security
Source: Quoted from the filing itself, not independently verified.

Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 7 filings · 7 states

View merged incident ↗

Illinois State AGAug 1 · first

Indiana State AG+12d

California State AG+12d

Massachusetts State AG+12d

Vermont State AG+12d

New Hampshire State AG+12d · this page

Texas State AG+13d

Pattern: first filing Aug 1 (IL), last Aug 14 (TX) — a 13-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/corporation-service-csc-20260813.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Aug 13, 2026
Raw hash: f225e13d44451b39ec66e7fb4f42addfeaf4519e0b7aca8563f31f7c21e3a231

Linked disclosures

Regulatory filings (6) · sorted by filing gap

Reporting entityCorporation Service Company

Victim entityCORPORATION SERVICE COMPANY

IncidentUnauthorized Access

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

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov