On Tuesday, December 9th, Adobe issued updates for Adobe Reader to address multiple security vulnerabilities that could potentially allow an attacker to take control of the affected system. Information Systems & Computing (ISC) strongly recommends that all users of Adobe Reader on both Windows and OS X systems update as soon as possible.
Users of Adobe Reader 11.x should update to version 11.0.0.10 as soon as possible. Adobe Acrobat Pro 11.x users should also update to version 11.0.0.10.
Users of the 10.x versions of Adobe Reader should also update to their respective patched version (10.1.13) and should consider moving to 11.0.0.10.
References
Adobe's security bulletin on the Acrobat vulnerabilities is located here:
http://helpx.adobe.com/security/products/reader/apsb14-28.html
The direct download link for Adobe Reader 11.0.0.10 is located here:
http://get.adobe.com/reader/
The Supported Products page for Adobe Reader has related information at:
https://secure.www.upenn.edu/computing/resources/category/applications/article/adobe-reader