https://www.cnbc.com/2018/10/02/facebook-data-breach-social-network-could-face-eu-fine.html

A top European regulator is considering opening a formal investigation into Facebook following a data breach that hit 50 million users and which could land the social network with millions of dollars in fines under strict new rules in the region.

On Friday, Facebook disclosed that it had discovered a security bug that allowed hackers to access information to around 50 million accounts.