CornerStone Staffing Solutions, Inc.
bd_d3cf7d8635702686 · schema v1 · pii pii-v2
Full breach record for CornerStone Staffing Solutions, Inc. →Cornerstone Staffing Solutions, Inc. based in Pleasanton, California, a business – retail or merchant entity reported a data breach to the Texas Attorney General. The breach was discovered on 2026-08-07 and reported on 2026-09-15. 4,425 Texas residents were affected. 366,122 individuals affected in total. Types of information involved: Name of individual;Address;Social Security Number Information;Driver’s License number;Government-issued ID number (e.g. passport, state ID card);Financial Information (e.g. account number, credit or debit card number);Medical Information;Health Insurance Information;Other;Date of Birth. Consumers were notified via U.S. Mail.
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Incident timeline
Aug 7, 2026
Discovered
Sep 15, 2026
Filed
vs. sector median
2 wks faster
Linked disclosures
Why this link?Ransomware claims (1)
- Leak Siteqilinbd_ec840b7d9ffbec102025-11-13 · +306dVerified by operator
Regulatory filings (3) · sorted by filing gap
- Vermont State AGbd_29de5dbb97b766ee2026-09-12 · +3dVerified
- California State AGbd_e4dfd8c0234818a12026-09-11 · +4dVerified
- Massachusetts State AGbd_22dd62acb7c5bd852026-09-01 · +14dVerified
Filing propagation · 4 filings · 4 states
View merged incident ↗Pattern: first filing Sep 1 (MA), last Sep 15 (TX) — a 14-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?
Evidence ladder
Attacker assertion only. Establishes: claim date, group, alleged victim.
Unlocks: incident narrative, operational impact. Still no compliance clock.
Unlocks: discovery date, data types, affected count, compliance clock.
Unlocks: materiality, stated response, full audit trail. Ceiling removed.