CERT Technical Cyber Security Alert TA08-043A

If you are using

* Adobe Reader version 8.1.1 and earlier and/or
* Adobe Acrobat Professional, 3D, and Standard versions 8.1.1 and earlier

you should read http://www.us-cert.gov/cas/techalerts/TA08-043A.html

At least one of the reported vulnerabilities is actively being exploited. Since most browsers are set to automatically load and open PDF files many users are exposed. The techalert explains how to protect yourself.