In mid-2011, the Russian instant messaging service known as QIP (Quiet Internet Pager) suffered a data breach. The attack resulted in the disclosure of over 26 million unique accounts including email addresses and passwords with the data eventually appearing in public years later.
Accounts breached: 26183992
Breached on: June 01, 2011
Exposed data: Email addresses, Passwords, Usernames, and Website activity
Added on: January 08, 2017