DisclosureLens
UnknownProfessional ServicesProfessional ServicesDelayed DiscoveryLow

CornerStone Staffing Solutions, Inc.

bd_a19802f40428b48c · schema v1 · pii pii-v2

Severity

Low

Discovered

Nov 17, 2025

Filed

Sep 11, 2026

To disclose

43 weeks

Affected

681state residents only

Linked

6 filings

Confidence

95%
Full breach record for CornerStone Staffing Solutions, Inc. →

Cornerstone Staffing Solutions, Inc., a business sector entity reported a unauthorized access incident to the Washington Attorney General. The organization became aware of the incident on 2025-11-17 and filed notice on 2026-09-11. 681 Washington residents were affected. 298 days elapsed between awareness and notification. 11 days to identify the breach. 4 days to contain the breach.

Washington clock✗ WA AG >90d43 weeks 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

discovery → filing · 43 weeks / 298 days

Nov 17, 2025

Discovered

Sep 11, 2026

Filed

vs. sector median

+24 wks slower

This filing is one of 6 about the same incident.View merged incident
A leak claim by qilin about this victim predates this filing by 301 days.View originating leak claim

Linked disclosures

Why this link?

Ransomware claims (1)

Regulatory filings (4) · sorted by filing gap

Filing propagation · 5 filings · 5 states

View merged incident ↗
Massachusetts State AGSep 1 · first
California State AG+10d
Washington State AG+10d · this page
Vermont State AG+11d
Texas State AG+14d

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

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.