>> reporter: larry, surprisingly plenty of people we spoke with today tell me hey, achacks happ. but this was a big one. the massive breach announced friday has made it possible for hackers to take over people's accounts through facebook's view as option. the feature allows people to see what their profile looks like to another user. >> we do know how the hack worked in very basic terms, but we don't know how long the vulnerability might have existed. we don't know what it was used for by hackers. it's very messy right now. >> reporter: the social giant says it has fixed the vulnerability and informed law enforcement. access tokens for 90 million users have also been reset meaning those people will now have to log back into facebook or any of their apps that use facebook log in. finally the company has temporarily disabled its view as feature. surprisingly the major breach hasn't bothered anyone. >> normally when i do it's pictures of my have away. >> it waists too much of time and i don't think it makes too much happy. >> reporter: if you plan to sta connected you can do so safe