Hacking tool lets anyone link your email address to your Facebook account It's feared that the new tool used by criminals could be combined with the leaked database of details of 533m Facebook users 21 April 2021 • 10:17am There are renewed fears over the privacy of Facebook users after security researchers discovered a tool used by cyber criminals to link people’s private email addresses to their Facebook accounts. The software scans lists of tens of thousands of email addresses and searches Facebook’s site to discover the profiles linked to the email addresses, giving criminals a quick and easy way to compile people’s details for future scams.