https://motherboard.vice.com/en_us/article/9k8qv5/steam-exploit-left-users-vulnerable-for-10-years

Hackers could have taken advantage of a nasty bug in the hugely popular video game platform Steam to take over victims’ computers.

The vulnerability has been present and exploitable in Steam for at least 10 years, according to Tom Court, a security researcher at Contextis, who wrote about the bug on Wednesday. Court said the bug left all 125 million Steam users vulnerable until March of this year, when Valve, the developers of Steam, patched it.