Critical vulnerabilities have been identified in Adobe Reader X (10.1) and earlier versions for Windows and Macintosh, Adobe Reader 9.4.2 and earlier versions for UNIX, and Adobe Acrobat X (10.1) and earlier versions for Windows and Macintosh. These vulnerabilities could cause the application to crash and potentially allow an attacker to take control of the affected system.

Adobe recommends users of Adobe Reader X (10.1) and earlier versions for Windows and Macintosh update to Adobe Reader X (10.1.1). More information is available in APSB11-24.

The 10.1.1 update comes as a Windows Installer Patch file (MSP) for Adobe Reader 10.1.0:

• Adobe Reader 10.1.1 update - All languages
• Adobe Reader 10.1.1 update - Multilingual (MUI) installer

Check out "Deploying and administering Acrobat X and Reader X" and the new 'Adobe Customization Wizard X' which makes it very easy to customize the Adobe Reader for deployment.