Have you heard of Shellshock vulnerability ?Are you susceptible to be harmed by it ?
Shellshock is a Bash shell exploit. Only computers using a Linux distribution or OS X are using Bash
So if you are using only Windows you are not affected.
If you are using OS X and have declared some Unix advanced services, you might be in trouble.
If you are using servers running on a Linux distributions (most of web servers are), you might be in trouble too. Just apply the patches provided by the distributions.
For more information, read the French version of this article.