An update has been released for Left 4 Dead 2. - Fixed two exploits that could allow remote code execution on clients and servers. - Disabled some debug tracking that was causing a crash.

An update has been released for Left 4 Dead. - Fixed exploits that could allow remote code execution. - Remove forced shutdown when ctrl-alt-del is pressed. - Protect against a reported crash caused by a map name parsing failure. - Protect against a reported crash when returning to a lobby.