DisclosureLens
UnknownEducationEducationDelayed DiscoveryEducationIdentity (basic)Government IDMedium

Southern Illinois University

bd_bfb3908784c2f158 · schema v1 · pii pii-v2

Severity

Medium

Discovered

Sep 29, 2025

Filed

Aug 20, 2026

To disclose

46 weeks

Affected

552state residents only

Linked

4 filings

Confidence

95%
Full breach record for Southern Illinois University →3 incidents on file

Southern Illinois University, a education sector entity reported a unauthorized access incident to the Washington Attorney General. The organization became aware of the incident on 2025-09-29 and filed notice on 2026-08-20. 552 Washington residents were affected. 325 days elapsed between awareness and notification. 81 days to identify the breach. 0 days to contain the breach.

Washington clock✗ WA AG >90d46 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 · 46 weeks / 325 days

Sep 29, 2025

Discovered

Aug 20, 2026

Filed

This filing is one of 4 filings about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (3) · sorted by filing gap

Filing propagation · 4 filings · 4 states

View merged incident ↗
California State AGAug 20 · first
Vermont State AGAug 20 · first
Washington State AGAug 20 · first · this page
Texas State AG+1d

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.