BreachCensus

Columbia University

United States of America

Columbia University is an organisation in United States of America. It appears on the Massachusetts Attorney General breach-notification register, the California Attorney General breach-notification register, the Washington State Attorney General breach-notification register and the Texas Attorney General breach-notification register with 1 confirmed incident (2 filings); the most recent notice was filed on August 8, 2025.

Data as of September 6, 2026.

Confirmed incident

Filed in IA, WA, CA, DE, MA and TX — Hacking/IT Incident

The same incident was filed separately with 6 jurisdictions within a few days of each other (IA, WA, CA, DE, MA and TX) — shown here as one incident.

Occurred
May 16, 2025
Disclosed
August 7, 2025
Records affected
3,067,242

Timeline

  1. August 7, 2025
    Reported to regulator Regulator

    MA AG breach notification: 28,138 Massachusetts residents affected

    source
  2. August 7, 2025
    Reported to regulator Regulator

    CA AG breach notification: an unknown number of California residents affected

    source
  3. August 7, 2025
    Reported to regulator Regulator

    WA AG breach notification: 54,075 Washington residents affected

    source
  4. August 7, 2025
    Reported to regulator Regulator

    DE AG breach notification: 1,818 Delaware residents affected

    source
  5. August 8, 2025
    Reported to regulator Regulator

    IA AG breach notification: an unknown number of Iowa residents affected

    source
  6. May 20, 2026
    Reported to regulator Regulator

    TX AG breach notification: 161,544 Texas residents affected

    source

Litigation

  • Possible litigation — multiple candidate dockets found, not yet resolved to a single case.
What a Washington notice means

Required under RCW 19.255.010. Notice to the Attorney General is required when a breach affects more than 500 Washington residents.

Note: the count is Washington residents only, not a total.

Washington breach-notification register ↗

What a California notice means

Required under Cal. Civ. Code §1798.82. A copy of the notification must be sent to the Attorney General when a single breach requires notifying more than 500 California residents.

Note: no affected-count is published on this register.

California breach-notification register ↗

What a Massachusetts notice means

Required under M.G.L. c. 93H. Notice to the Attorney General is required for a breach affecting any number of Massachusetts residents' personal information -- the statute sets no minimum count.

Note: the count is Massachusetts residents only, not a total.

Massachusetts breach-notification register ↗

What a Texas notice means

Required under Tex. Bus. & Com. Code §521.053. Notice to the Attorney General is required when a breach affects at least 250 Texas residents.

Note: the published count is a total, not limited to Texas residents.

Texas breach-notification register ↗