Hi Plarts ,
FYI ,
HotFix is common for both 64-bit and 32-bit Servers .
We release Security HotFix to fix any critical security Issue in the product . Please make sure you are updated to latest Security HotFix .
Security Bulletin and Technote released with the HotFix gives you the step by step process to be followed to apply the HotFix .
Here are the links for the Security Bulletin and Technote for the latest Security HotFix :
http://www.adobe.com/support/security/bulletins/apsb13-13.html
http://helpx.adobe.com/coldfusion/kb/coldfusion-security-hotfix-apsb13 -13.html
Also refer the below link to lockdown your server
Yes . CF10 is relatively more secure and also the HotFix update mechanism is much more easier .
Regards,
YASHAS RATTEHALLI
ADOBE CF Team