Description:
The 37MB sized hotfix for Crysis fixes the known security hole in the game code which casues client and server crashes. Be sure that you have patch 1.2 installed before, since this is required to apply the hotfix to your Crysis installation.


Important Information:
Patch 1.2 can be applied to both vanilla Crysis (v1.0) and Crysis v1.1 since it will update automatically to Crysis version 1.2.


Hotfix 1.21 Changelog:

Optimizations and Stability

* Fixed security hole in code that caused client and server crashes.


Notes:
This hotfix requires Crysis to be patched to version 1.2 before it can be applied.


-Crysis Dev Team