
It is recommended that you uninstall QuickTime from any of your PCs, laptops, or PDAs that are Windows Operating System based.
Per http://zerodayinitiative.com/advisories/ZDI-16-241/:
This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Apple QuickTime. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.