Every public data breach

Disclosed this week44On record26,355

44 disclosed this week · 26,355 on record

CK-12 Foundation

Disclosed Jul 27, 2020Confirmed

Official notice

What is known

People affectedNot stated in the sources we have
DisclosedJul 27, 2020
DiscoveredJun 1, 2020
HappenedFeb 26, 2020
AttackHacking
Data exposedNot stated
SectorNonprofit · US
StatusConfirmed

Sources

Official noticeoag.ca.gov
California Attorney General breach notice: CK-12 Foundation
Official noticeatg.wa.gov
Washington Attorney General breach notice: CK-12 Foundation
Official noticejustice.oregon.gov
Oregon DOJ breach notice: CK-12 Foundation

Notices filed

Residents of CAJul 27, 2020
California AGCount not stated
Residents of WAJul 27, 2020
Washington AG5,017 people
Residents of ORJul 27, 2020
Oregon DOJ523,443 people
History of this record
attack2026-09-25
unknown to hackingby backfillSource
discovered2026-09-25
empty to 2020-06-01by backfillSource
Added2026-09-25
First recordedby backfillSource

First seen 2026-09-25 (California AG), confirmed by California AG. Record counts are as reported. Not legal advice.

Everything about CK-12 Foundation