The dataset, found on a computer hijacker website, seems to be years old.
Personal information about hundreds of millions of Facebook users, including names, dates of birth and phone numbers, would have been posted on a Web site for hackers.
The dataset includes information on 533 million users from 106 countries, according to Business Insider, who first reported on its availability. These data, which seem to date back several years, were first discovered in January in hacker circles by Alon Gal, CTO of the cybercrime intelligence firm Hudson Rock.
Facebook did not immediately respond to a request for comments, but a spokesperson tweeted that the data originated from a previous leak.
“These are old figures that were reported in 2019,” said Liz Bourgeois, Facebook spokesperson. “This problem was discovered and resolved in August 2019.”
In spite of its age, the dataset could provide invaluable information to identity thieves and other crooks.
“The bad actors will certainly use the information for social engineering, fraud, piracy and marketing,” Gal said in a tweet on Saturday.