QUOTE
Critical vulnerabilities have been identified in the current versions of Adobe Flash Player (v9.0.159.0 and v10.0.22.87) for Windows, Macintosh and Linux operating systems, and the authplay.dll component that ships with Adobe Reader and Acrobat v9.x for Windows, Macintosh and UNIX operating systems. These vulnerabilities could cause the application to crash and could potentially allow an attacker to take control of the affected system.
Full details at http://www.adobe.com/support/security/bull.../apsb09-10.html
Adobe Acrobat / Reader updates are available using the check for updates feature under program's help menu.
For manual updates refer to the Adobe article above.