Valve has confirmed a major source code leak earlier this week involving two of its most popular competitive multiplayer games, Counter-Strike: Global Offensive and Team Fortress 2. Players of the games have been concerned that the code leak for the popular and active games would allow hackers to find ways to develop remote code execution

Source: Hot Hardware – Valve Confirms Team Fortress 2 And CS:GO Source Code Leak, Downplays Potential Threat