HackingProfessional ServicesProfessional ServicesCustomer Data InvolvedPIIIdentity (basic)CriticalContained

Cardinal Services

bd_00d73c1588b546a9 · schema v1 · pii pii-v1

Severity

Critical

Discovered

May 12, 2026

Filed

May 20, 2026

To disclose

8 days

Affected · nationwide

142,32311 in this filing

Linked

13 records

Confidence

66%

Full breach record for Cardinal Services →

Cardinal Services, Inc. (including Cardinal Employer Organization and Preferred Employer Solutions) reported an external system breach (hacking) occurring between June 25, 2025, and August 8, 2025. The breach was discovered on May 12, 2026, affecting 142,323 individuals, including 11 Maine residents. The incident involved the acquisition of personal identifiers, likely including government-issued IDs. Cardinal provided written notification and offered 12 months of credit monitoring via Epiq.

J jump to incidentP pin to compareR raw source

Leak gap clock✗ Leak >180d8 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 · 321 days

discovery → filing · 8 days

Jun 25, 2025

Begins

May 12, 2026

Discovered

May 20, 2026

Filed

vs. sector median

18 wks faster

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 309 days before this filing.View originating leak claim

Linked disclosures

Why this link?

Regulatory filings (10) · sorted by filing gap

Vermont State AGbd_10fd00d93b5c10492026-05-20Verified
California State AGbd_6193fc40e2330bf52026-05-20Verified by operator
Washington State AGbd_aa2abd061d19d40b2026-05-20Verified
Massachusetts State AGbd_b0de62b8dcc4f4e12026-05-20Verified by operator

Show 6 more filings ↓up to 7d gap

Indiana State AGbd_b8b3a9190c8646192026-05-20Verified
Montana State AGbd_cb7cdf284827fc902026-05-20Verified by operator
Nebraska State AGbd_d631d3ca160719f92026-05-20Verified by operator
Texas State AGbd_c3ccb041077247c72026-05-22 · +2dVerified by operator
New Hampshire State AGbd_3fa3a4994a4ee2282026-05-26 · +6dVerified by operator
Oregon State AGbd_758bd2f1d1e91ee42026-05-27 · +7dVerified by operator

Showing first 10 of 12 linked disclosures.

Name: Cardinal Services
norm: cardinal services
Domain: cardinal-services.com

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

Discovered: May 12, 2026
Breach occurred: Jun 25, 2025 – Aug 8, 2025
Undetected for: 321 daysoccurrence → discovery
Materiality determined: —
Notification sent: May 20, 2026
Affected individuals: 142,323state + nationwide
Data types: Government IDIdentity (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing Application
Threat actor: External
Regulator citations: Filed data breach notice with Maine Attorney General
Initial access: exploit_public_facing

During the incident: Sent written notification to affected individuals
Offered 12 months of credit monitoring through Epiq
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 8 days(8 days from discovery to filing)
Compliance flags: Leak >180dME AG ≤30d · 8d
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: May 12, 2026
→ Filed with AG: May 20, 2026
8d 30 days ME AG ≤30d

Statute	Window	Elapsed	Threshold	Status
Maine	Discovered: May 12, 2026 → Filed with AG: May 20, 2026	8d	30 days	ME AG ≤30d

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 11 filings · 11 states

View merged incident ↗

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

Maine State AGMay 20 · first · this page

Texas State AG+2d

New Hampshire State AG+6d

Oregon State AG+7d

Pattern: first filing May 20 (VT), 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://www.maine.gov/agviewer/content/ag/985235c7-cb95-4be2-8792-a1252b4f8318/6676cbb8-2eb5-4fee-9e9d-bca0fb919405.html
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: May 20, 2026
Raw hash: 1606cae479369b88ddf70e2527042787dc6c04111f6addc872b9595465c620c9

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityCardinal Services

Victim entityCardinal Services

Incidentdiscovered May 12, 2026

Stated responseSent written notification to affected individuals

ComplianceLeak >180d

Extraction provenanceno artifact recorded

Source provenancewww.maine.gov