Adobe today shipped a critical Reader/Acrobat patch to cover a total of 17 documented vulnerabilities that expose Windows, Mac and UNIX users to malicious hacker attacks. The update includes a fix for the outstanding PDF /Launch functionality social engineering attack vector that was disclosed by researcher Didier Stevens. The latest version includes changes to resolve the misuse of this command in Adobe Reader/acrobat 9.3.2 (and earlier versions), according to Adobe. We added functionality to block any attempts to launch an executable or other harmful objects by default.
Source: https://threatpost.com/critical-pdf-reader-patch-fixes-launch-command-attack-vector-062910/74161/