HackingProfessional ServicesProfessional ServicesCustomer Data InvolvedDelayed DiscoveryFinancial accountHealth (basic)Identity (basic)Government IDMediumContained

Cardinal Services

bd_b0de62b8dcc4f4e1 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Jun 30, 2025

Filed

May 20, 2026

To disclose

46 weeks

Affected

32state residents only

Linked

13 records

Confidence

67%

Full breach record for Cardinal Services →

Cardinal Services, Inc. and related entities experienced unauthorized access to their systems, first detected on June 30, 2025, with further access discovered on August 8, 2025. A forensic investigation concluded on May 12, 2026, that personal information including full name, Social Security number, and medical information was impacted. The company engaged external cybersecurity professionals, secured its environment, and is offering complimentary credit monitoring to affected individuals.

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Massachusetts clock✗ MA AG >90d46 weeks discovery → filing

Incident timeline

discovery → filing · 46 weeks / 324 days

Jun 30, 2025

Discovered

May 20, 2026

Filed

vs. sector median

+27 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 309 days before this filing.View originating leak claim

Linked disclosures

Why this link?

Regulatory filings (10) · sorted by filing gap

Maine State AGbd_00d73c1588b546a92026-05-20Verified by operator
Vermont State AGbd_10fd00d93b5c10492026-05-20Verified
California State AGbd_6193fc40e2330bf52026-05-20Verified by operator
Washington State AGbd_aa2abd061d19d40b2026-05-20Verified

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: Jun 30, 2025
Materiality determined: —
Notification sent: —
Affected individuals: 32state-resident count only
Data types: Financial accountHealth (basic)Identity (basic)Government ID
Attack vector: Unknown
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External

During the incident: Commenced an investigation into the incident
Worked with external cyber security professionals
Secured its internal environment
Conducted extensive forensic investigation and complex manual document review
Offering complimentary access to Epiq Privacy Solutions ID
Changes made: Continually evaluate and modify practices and internal controls to enhance security and privacy
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 46 weeks(324 days from discovery to filing)
Compliance flags: MA AG >90dLeak >180d
Discovery-date grounding: letter-groundedThe discovery date is the detection date narrated in the notification letter — the defensible tier.

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

Indiana State AGMay 20 · first

Montana State AGMay 20 · first

Nebraska State AGMay 20 · first

Massachusetts State AGMay 20 · first · this page

Texas State AG+2d

New Hampshire State AG+6d

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://www.mass.gov/doc/2026-823-cardinal-services-inc-cardinal-employer-organization-and-preferred-employer-solutions/download
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: f466b4e0657d8f4c85afd825ae9163d806dadaf2d59ab74f2f79344ccee1ead3

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityCardinal Services

Victim entityCardinal Services

Incidentdiscovered Jun 30, 2025

Stated responseCommenced an investigation into the incident

ComplianceMA AG >90d

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov