Adobe has released updated versions of Adobe Reader and Adobe Acrobat that fix critical security issues affecting Windows systems. (Adobe Reader and Adobe Acrobat for Mac OS X are not affected.) These critical security issues could cause the application to crash and potentially allow an attacker to take control of the affected system.
Windows users should update to Acrobat and/or Reader XI (11.0.08).
More information, as well as links to software updates from Adobe, is available here: