The latest versions of Adobe Reader and Acrobat (version 11.0.01), X (version 10.1.5) and earlier versions for Windows and Macintosh, have critical vulnerabilities that can be exploited by a hacker. These vulnerabilities could cause the application to crash and potentially allow an attacker to take control of your computer.
Adobe said they are aware of these vulnerabilities being exploited where a malicious PDF is sent in an e-mail message designed to trick users into clicking on or opening it.
Adobe is in the process of working on a fix for these issues and when a fix or patch is ready, it will be posted at this website http://blogs.adobe.com/psirt/ .
Keep checking http://blogs.adobe.com/psirt/ for a fix or patch and be careful when opening PDFs. If you are currently receiving PDF documents in an e-mail message or links to one, do not open them or click on the links until Adobe is able to fix or patch this exploit or vulnerabilities.