2014 — AOL: AOL has sent a message to millions of its account…
Data compromised
Personal information
Technical writeup
AOL has sent a message to millions of its account holders of a data breach to their system urging them to change their usernames and passwords. AOL won't confirm an exact number but it appears to be approximately 2 percent of its accounts.AOL noticed the attack when a significant amount of spam began appearing from spoofed emails from AOL account holders email addresses.
Root cause
Hacking