533 million Facebook users’ phone number has been leaked on a popular hacker forum for free.

The sold data included 533,313,128 Facebook users, with information such as a member’s mobile number, Facebook ID, name, gender, location, relationship status, occupation, date of birth, and email addresses.

According to Alon Gal, CTO of cybercrime intelligence firm Hudson Rock, it is believed that threat actors exploited in 2019 a now-patched vulnerability in Facebook’s “Add Friend” feature that allowed them to gain access to member’s phone numbers. 

The top 20 geographic locations where members were exposed, as described by the threat actor, are listed below:

LocationNumber of users
Egypt44,823,547
Tunisia39,526,412
Italy35,677,323
USA32,315,282
Saudi Arabia28,804,686
France19,848,559
Turkey19,638,821
Morocco18,939,198
Colombia17,957,908
Iraq17,116,398
Africa14,323,766
Mexico13,330,561
Malaysia11,675,894
United Kingdom11,522,328
Algeria11,505,898
Spain10,894,206
Russia9,996,405
Sudan9,464,772
Nigeria9,000,131
Peru8,075,317

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