TransUnion

Disclosed Oct 23, 20187 years agoConfirmed

Official notice

What is known

People affected	Not stated in the sources we have
Disclosed	Oct 23, 2018
Happened	Feb 22, 2017
Attack	Not stated
Data exposed	Names, Social Security numbers, Government IDs, Payment cards, Names
Sector	Finance · US
Status	Confirmed

Sources

Source	Kind
Maine Attorney General breach notice archive: TransUnionmaine.gov · Official notice	Official notice

Notices filed

Where	Filed	People
Maine AGresidents of ME	Oct 23, 2018	396

Other breaches at TransUnion

Breach	Disclosed	Attack	Sector	Status	Affected
TransUnion third-party app breach exposes 4.4 million consumersAug 26, 20251 year agoVendor breach	Aug 26, 20251 year ago	Vendor breach	Finance	Confirmed	4.5M
Disclosed Aug 4, 2022Aug 4, 20224 years ago	Aug 4, 20224 years ago	Not stated	Finance	Confirmed	12K

History of this record

2026-09-25 · added · backfill source

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

Everything about TransUnion

New breaches by email

Wednesdays, only in weeks with newly disclosed breaches, the largest first.