https://www.reuters.com/article/us-facebook-cyber/facebook-says-big-breach-exposed-50-million-accounts-to-full-takeover-idUSKCN1M82BK

Facebook Inc said on Friday that hackers stole digital login codes allowing them to take over nearly 50 million user accounts in its worst security breach ever given the unprecedented level of potential access, adding to what has been a difficult year for the company's reputation.