UnknownEducationEducationGovernment IDHealth (basic)Financial accountHigh

Columbia University

bd_0e780a9cd65865c9 · schema v1 · pii pii-v1

Severity

High

Discovered

—

Filed

Aug 7, 2025

To disclose

—

Affected

28,138state residents only

Linked

15 filings

Confidence

95%

Full breach record for Columbia University →7 incidents on file

Columbia University reported a data breach to the Massachusetts Office of Consumer Affairs and Business Regulation. The breach was reported on 2025-08-07. 28,138 Massachusetts residents were affected.

J jump to incidentP pin to compareR raw source

Massachusetts clock✓ MA credit monitoring due

⚠ no discovery dateNo discovery date was extracted, so no notification clock can be evaluated.

Incident timeline — partial

? — ?

Breach window unknown

Aug 7, 2025

Filed

—

Corroborated · see linked filings

Compliance clocks stay unassessable until a regulatory filing lands. Dashed segments fill in automatically when corroboration arrives.

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

Maine State AGbd_07533b0c85ac791c2025-08-07Candidate
Washington State AGbd_2c8504262b9c10eb2025-08-07Verified
Indiana State AGbd_44bbed6c166a9c6d2025-08-07Verified
Nebraska State AGbd_4af6126d602d67a62025-08-07Verified

Show 6 more filings ↓up to 19d gap

Delaware State AGbd_82648491a36c0afc2025-08-07Verified
Montana State AGbd_88b5b3d68c5a023a2025-08-07Verified
Vermont State AGbd_9b1ee72034df1e552025-08-07Verified
Iowa State AGbd_2337be0c0546ca352025-08-08 · +1dVerified
New Hampshire State AGbd_1de0d58aeabac3772025-08-12 · +5dVerified
Rhode Island State AGbd_d3027779956216f92025-08-26 · +19dVerified

Showing first 10 of 14 linked disclosures.

Name: Columbia University
norm: columbia university

Name: Columbia University
norm: columbia university
Industry: Educationregulator portal

Discovered: —
Materiality determined: —
Notification sent: —
Affected individuals: 28,138state-resident count only
Data types: Government IDHealth (basic)Financial account
Data elements: Social Security numberMedical informationFinancial account numberDriver's licence number
Stated not affected: Payment card number
The filing states these were not involved. Categories absent from both lists were not addressed either way.
Attack vector: Unknown

Compliance flags: MA credit monitoring due
Discovery-date grounding: no discovery dateNo discovery date was extracted, so no notification clock can be evaluated.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 11 filings · 11 states

View merged incident ↗

Maine 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

Vermont State AGAug 7 · first

Massachusetts 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.

Source URL: https://www.mass.gov/doc/data-breach-report-2025/download
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Aug 7, 2025
Raw hash: f99eb285eca8b2114fdef668011e665f2bda3f09ee9646bf26822e8c9a8cfcd9

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityColumbia University

Victim entityColumbia University

IncidentUnknown

ComplianceMA credit monitoring due

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov