Adobe has released a security update for its products Adobe Reader and Adobe Acrobat for both Microsoft Windows and Apple Macintosh that closes one critical security vulnerability. Affected versions are Adobe Reader 8.0 through 8.1.2, Adobe Reader 7.0.9 and earlier, Adobe Acrobat Professional, 3D and Standard 8.0 through 8.1.2 and Adobe Acrobat Professional, 3D and Standard 7.0.9 and earlier.
Adobe Reader 9 and Acrobat 9 as well as Adobe Reader 7.1.0 and Acrobat 7.1.0 are not affected by the security vulnerability. The vulnerability causes the applications to crash which can allow an attacker to take control of the host system.
Downloads are available that fix the security vulnerability in Adobe Reader 8 for Windows and Macintosh computers. Take a look at the security bulletin issued by Adobe if you are using Adobe Acrobat or a previous version of one of the products to find the links pointing to updates for your product.

Adobe Reader and Acrobat Security Updates
Critical Adobe Reader Update
I’d stick to FoxIt Reader, less chance for security breaches.