Southern Illinois University

Disclosed Aug 20, 20265 weeks ago44,118 affectedConfirmed

What is known

People affected	44,118 (as reported by the organization)
Disclosed	Aug 20, 2026
Discovered	Sep 29, 2025
Happened	Sep 29, 2025
Attack	Hacking
Data exposed	Social Security numbers, Addresses, Names
Sector	Education · US
Status	Confirmed

Source	Kind
California Attorney General breach notice: Southern Illinois Universityoag.ca.gov · Official notice	Official notice
Washington Attorney General breach notice: Southern Illinois Universityatg.wa.gov · Official notice	Official notice
Texas Attorney General data security breach report BR-0005277: Southern Illinois Universityoag.my.site.com · Official notice	Official notice
Vermont Attorney General breach report: Southern Illinois Universityago.vermont.gov · Official notice	Official notice

Where	Filed	People
California AGresidents of CA	Aug 20
Washington AGresidents of WA	Aug 20	552
Vermont AGresidents of VT	Aug 20	23
Texas AGresidents of TX	Aug 21	1,597

Breach	Disclosed	Attack	Sector	Status	Affected
Disclosed Oct 24, 2023Oct 24, 20232 years ago	Oct 24, 20232 years ago	Not stated	Education	Confirmed	38K

History of this record

2026-09-25 · source: empty to https://ago.vermont.gov/categories/security-breach-notices · backfill source
2026-09-25 · data_types: [] to ["ssn","addresses","names"] · backfill source
2026-09-25 · records_basis: empty to organization · backfill source
2026-09-25 · records: empty to 44118 · backfill source
2026-09-25 · attack: unknown to hacking · backfill source
2026-09-25 · discovered: empty to 2025-09-29 · backfill source
2026-09-25 · added · backfill source

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