HackingProfessional ServicesProfessional ServicesDelayed DiscoveryCustomer Data InvolvedIdentity (basic)Government IDMediumContained

Cardinal Services

bd_3fa3a4994a4ee228 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Jun 30, 2025

Filed

May 26, 2026

To disclose

47 weeks

Affected

9state residents only

Linked

13 records

Confidence

65%

Full breach record for Cardinal Services →

New Hampshire Attorney General notification regarding Cardinal Services, Inc. et al. regarding unauthorized access to systems between June 25-26, 2025. Approximately 9 NH residents affected. Data included names, SSNs, and driver's license numbers. Notification sent May 20, 2026, offering credit monitoring.

J jump to incidentP pin to compareR raw source

Leak gap clock✗ Leak >180d47 weeks discovery → filing

⚠ unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Incident timeline

undetected · 5 days

discovery → filing · 47 weeks / 330 days

Jun 25, 2025

Begins

Jun 30, 2025

Discovered

May 26, 2026

Filed

vs. sector median

+28 wks slower

This filing is one of 13 records about the same incident.View merged incident

A leak claim by rhysida about this victim was first seen 315 days before this filing.View originating leak claim

Linked disclosures

Why this link?

Regulatory filings (10) · sorted by filing gap

Oregon State AGbd_758bd2f1d1e91ee42026-05-27 · +1dVerified by operator
Texas State AGbd_c3ccb041077247c72026-05-22 · +4dVerified by operator
Maine State AGbd_00d73c1588b546a92026-05-20 · +6dVerified by operator
Vermont State AGbd_10fd00d93b5c10492026-05-20 · +6dVerified

Show 6 more filings ↓up to 6d gap

California State AGbd_6193fc40e2330bf52026-05-20 · +6dVerified by operator
Washington State AGbd_aa2abd061d19d40b2026-05-20 · +6dVerified
Massachusetts State AGbd_b0de62b8dcc4f4e12026-05-20 · +6dVerified by operator
Indiana State AGbd_b8b3a9190c8646192026-05-20 · +6dVerified
Montana State AGbd_cb7cdf284827fc902026-05-20 · +6dVerified by operator
Nebraska State AGbd_d631d3ca160719f92026-05-20 · +6dVerified by operator

Showing first 10 of 12 linked disclosures.

Name: MCDONALD HOPKINS LLC
norm: mcdonald hopkins

Name: Cardinal Services
norm: cardinal services
Domain: cardinal-services.com
Industry: Professional Servicesllm

Discovered: Jun 30, 2025
Breach occurred: Jun 25, 2025 – Jun 26, 2025
Undetected for: 5 daysoccurrence → discovery
Materiality determined: —
Notification sent: May 20, 2026
Affected individuals: 9state-resident count only
Data types: Identity (basic)Government ID
Data elements: Social Security number
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing Application
Threat actor: External
Initial access: exploit_public_facing

During the incident: Worked with external cyber security professionals
Secured internal environment
Conducted extensive forensic investigation
Performed complex manual document review
Provided written notification to affected residents
Offered complimentary one-year credit monitoring membership
Changes made: Continually evaluates and modifies practices to enhance security and privacy
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 47 weeks(330 days from discovery to filing)
Compliance flags: Leak >180d
Discovery-date grounding: unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 11 filings · 11 states

View merged incident ↗

Maine State AGMay 20 · first

Vermont State AGMay 20 · first

California State AGMay 20 · first

Washington State AGMay 20 · first

Massachusetts State AGMay 20 · first

Indiana State AGMay 20 · first

Montana State AGMay 20 · first

Nebraska State AGMay 20 · first

Texas State AG+2d

New Hampshire State AG+6d · this page

Oregon State AG+7d

Pattern: first filing May 20 (ME), last May 27 (OR) — a 7-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

Cascade drawn from the first 10 linked disclosures of 12 — the full spread may be wider.

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/cardinal-services-cardinal-employer-organization-preferred-employer-solutions-20260526.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: May 26, 2026
Raw hash: c8841ad6e47f0308d284c835d58575b2a30f6c513fd5ca5633dfea9b0bdacc6b

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityMCDONALD HOPKINS LLC

Victim entityCardinal Services

Incidentdiscovered Jun 30, 2025

Stated responseWorked with external cyber security professionals

ComplianceLeak >180d

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov