The personal information of 533 million Facebook users has been leaked online.

A user in a hacking forum on Saturday published the phone numbers and personal data of nearly 533 million Facebook users for free online.

The exposed data includes personal information of over 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.

A Facebook spokesperson told Insider that the data was scrapped due to a vulnerability that the company patched in 2019.

While a couple of years old, the leaked data could provide valuable information to cybercriminals who use people’s personal information to impersonate them or scam them into handing over login credentials, according to Alon Gal, CTO of cybercrime intelligence firm Hudson Rock, who first discovered the entire trough of leaked data online on Saturday.

“A database of that size containing the private information such as phone numbers of a lot of Facebook’s users would certainly lead to bad actors taking advantage of the data to perform social engineering attacks [or] hacking attempts,” Gal told Insider.

Now, the entire dataset has been posted on the hacking forum for free, making it widely available to anyone with rudimentary data skills.

All 533,000,000 Facebook records were just leaked for free.

This means that if you have a Facebook account, it is extremely likely the phone number used for the account was leaked.

I have yet to see Facebook acknowledging this absolute negligence of your data. https://t.co/ysGCPZm5U3 pic.twitter.com/nM0Fu4GDY8

- Alon Gal (Under the Breach) (@UnderTheBreach) April 3, 2021

Originally published at https://www.techlofy.com on April 5, 2021.