2010 — McDonald's: Hackers were able to access the information of…
Data compromised
Personal information
Technical writeup
Hackers were able to access the information of McDonald's customers. People who signed up for online promotions or newsletter subscriptions may have had their email addresses, contact information and birth dates exposed. McDonald's uses a company called Arc Worldwide for its marketing services. The breach was through Arc Worldwide's business partner Silverpop Systems Inc.
Root cause
Hacking