A user in a low level hacking forum on Saturday published the phone numbers and personal data of hundreds of millions of Facebook users for free online.
The exposed data includes personal information of over 533 million Facebook users from 106 countries, including over 32 million records on users in the US, 11 million on users in the UK, and 6 million on users in India. It includes their phone numbers, Facebook IDs, full names, locations, birthdates, bios, and — in some cases — email addresses.
Same as it ever was. Same as it ever was. Same as it ever was. INCOMPETENT.
Eideard 
Mark Zuckerberg’s cellphone number goes online after massive Facebook hack https://nypost.com/2021/04/03/mark-zuckerbergs-cellphone-number-goes-online-after-facebook-hack/
https://pbs.twimg.com/media/EyEkkwgXAAM2f6s?format=png
“…On Twitter, Facebook spokesperson Liz Bourgeois responded to a handful of news articles and posts about this leak by tweeting the same two-sentence statement: “This is old data that was previously reported on in 2019. We found and fixed this issue in August 2019.”
In other words, Facebook is responsible for a few hundred million users having their data leaked yet again (seriously, how many times is this now?), but don’t worry, it’s fine — they fixed the problem a long time ago. Not that this does anything to help un-leak the data that’s now in hackers hands, but, hey, Facebook did its part!” https://bgr.com/2021/04/03/facebook-data-leak-533-million-user-records-leaked-online/
After Data Breach Exposes 530 Million, Facebook Says It Will Not Notify Users https://www.npr.org/2021/04/09/986005820/after-data-breach-exposes-530-million-facebook-says-it-will-not-notify-users
In July 2019, months before patching up the aforementioned issue, Facebook reached a $5 billion settlement with the U.S. Federal Trade Commission for violating an agreement with the agency to protect user privacy.
(July 24, 2020): “FTC To Hold Facebook CEO Mark Zuckerberg Liable For Any Future Privacy Violations” https://www.npr.org/2019/07/24/741282397/facebook-to-pay-5-billion-to-settle-ftc-privacy-case
To find out whether your personal information was leaked in the breach, you can check the data tracking tool, HaveIBeenPwnd https://haveibeenpwned.com/
Its creator, Troy Hunt, updated the site with the latest data from the Facebook leak. Hunt said that 65% of the latest batch of data had already been added to the tracker from previous leaks.