In a large-scale user data breach of at least 533 million Facebook accounts on Saturday, hackers also reportedly leaked the personal cell phone number of Facebook CEO Mark Zuckerberg and made it easily accessible to the public.

The data was originally stolen in January by hackers working to crack security breaches on data tied to phone numbers associated with Facebook profiles.

The data was released partially on Friday and fully on Saturday on a hacker platform, according to Bloomberg. It is unclear if Zuckerberg will change his number as a result.

It was found that the hacker made available data that included details like phone numbers and other personal data for free.

https://twitter.com/UnderTheBreach/status/1378314424239460352?s=20

This data breach includes details of users from around 106 countries, including India. It is reported that data of 11 million users in the United Kingdom and six million users in India are found in this set of data leak.

Previous Facebook privacy breaches include the much-publicized Cambridge Analytica saga. In that incident, personal data from over 87 million Facebook users was improperly obtained by the political data-analytics firm.

Facebook was hit with a $5 billion fine from the Federal Trade Commission as part of a settlement over claims the company mishandled user data.