Facebook security breach: How to know if you got hacked Facebook says it is dealing with the largest security breach in the company's history. The cyberattack, which happened Tuesday, exposed the personal information of nearly 50 million users. It's just the latest hack on the social media giant. Wired magazine editor-in-chief Nicholas Thompson joins "CBS This Morning: Saturday" to discuss why we still don't know what information hackers stole and how to tell if you are one of the users whose information was exposed.