http://www.adobe.com/support/security/bulletins/apsb10-02.html
http://get.adobe.com/reader/
Release date: January 12, 2010
Critical vulnerabilities have been identified in Adobe Reader 9.2 and Acrobat 9.2 for Windows, Macintosh and UNIX, and Adobe Reader 8.1.7 and Acrobat 8.1.7 for Windows and Macintosh. These vulnerabilities could cause the application to crash and could potentially allow an attacker to take control of the affected system.
Adobe recommends users of Adobe Reader 9.2 and Acrobat 9.2 and earlier versions for Windows, Macintosh and UNIX update to Adobe Reader 9.3 and Acrobat 9.3
http://get.adobe.com/reader/