A hacker has obtained 171 million user accounts associated with social networking giant, VK.com.
The stolen database contains full names, email addresses and plain-text passwords, and in many cases locations and phone numbers.
The St. Petersburg, Russia-headquartered social network -- formerly known as VKontakte -- is said to be the largest in Europe, with over 350 million users at the last count. The hack is thought to have been carried out in late-2012 or early 2013, but the hacker who is selling the data could not be more precise.
Given the timing, the entire store of VK's data -- which at the time had just under 190 million users -- is likely to have been taken in the hack.