NEW DELHI: Personal data of nearly 533 million (53.3 crore) Facebook users, including 61 lakh Indians, remerged online after a hacker posted the details on a digital forum. The leaked data includes Facebook ID numbers, profile names, email addresses, location information, gender details, job data, and other details. The easy availability of such data may make users more vulnerable to cybercrime, although Facebook has said that this is "old data". "All 533,000,000 Facebook records were just leaked for free. This means that if you have a Facebook account, it is extremely likely the phone number used for the account was leaked," tweeted Alon Gal, CTO of security firm Hudson Rock.