2012 — TransUnion: An unauthorized access occurred sometime between…
Data compromised
Personal information
Technical writeup
An unauthorized access occurred sometime between January 22 and February 15, 2012. Trans Union learned of the breach through its subscriber The Manufacturers Life Insurance Company (Manulife). Consumers may have had their credit reports accessed by someone using a client's login credentials. Names, Social Security numbers, and addresses would have been exposed.
Root cause
Hacking