According to Correio da Manhã, the alert was given by the cybersecurity company Hudson Rock, which states that the phone numbers are being sold through a Telegram 'bot', which has been active since January 12, 2021, and that they may be used in 'smishing' and “other fraudulent activities”.

Mark Zuckerberg's social network had already admitted the leak, which was due to a “vulnerability” that it guaranteed to have resolved back in August 2019.

Many of the stolen numbers may be out of date, but the company recommends people pay extra attention to potential scams.