Crytek has released the 1.2 Patch for Crysis, with changes including both singleplayer and multiplayer gameplay tweaks, important fixes for a large number of issues, and a potential increase in performance in both DX9 and DX10 modes.
This includes this patch for Crysis Remastered, the last for the game on PC, which is the most impactful to date and which has been based on player feedback received since the release of the Remastered Trilogy.
The 37MB sized patch for Crysis fixes the known security hole in the game code which causes client and server crashes when playing online. Be sure that you have patch 1.2 installed before, since this is required to apply the hotfix to your Crysis installa