DisclosureLens
UnknownEducationHigh

Columbia University

bd_f8f32a88711240f8 · schema v1 · pii pii-v1

Severity

High

Discovered

Jul 8, 2025

Filed

Aug 7, 2025

To disclose

4 weeks

Affected

868,969

Linked

15 filings

Confidence

95%
Full breach record for Columbia University →7 incidents on file

Columbia University reported a data breach to the Oregon Attorney General. The breach was reported on 2025-08-07. The breach occurred during 5/16/2025 - 6/24/2025. The breach was discovered on 7/8/2025. 868,969 individuals were affected. Notice was sent on 8/7/2025.

Oregon clock✓ OR AG ≤45d4 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

undetected · 53 days
discovery → filing · 4 weeks / 30 days

May 16, 2025

Begins

Jul 8, 2025

Discovered

Aug 7, 2025

Filed

This filing is one of 15 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (10) · sorted by filing gap

Show 6 more filings ↓up to 19d gap

Showing first 10 of 14 linked disclosures.

Filing propagation · 11 filings · 11 states

View merged incident ↗
Maine State AGAug 7 · first
Massachusetts State AGAug 7 · first
Washington State AGAug 7 · first
Indiana State AGAug 7 · first
Nebraska State AGAug 7 · first
Delaware State AGAug 7 · first
Montana State AGAug 7 · first
Oregon State AGAug 7 · first · this page
Iowa State AG+1d
New Hampshire State AG+5d
Rhode Island State AG+19d

Pattern: first filing Aug 7 (ME), last Aug 26 (RI) — a 19-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 14 — 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.