Hyper-V in Microsoft Windows Vista SP2; Windows Server 2008 SP2 and R2; Windows 7 SP1; Windows 8.1; Windows Server 2012 Gold and R2; Windows 10 Gold, 1511, and 1607; and Windows Server 2016 allows guest OS users to execute arbitrary code on the host OS via a crafted application, aka "Hyper-V Remote Code Execution Vulnerability." This vulnerability is different from that described in CVE-2017-0109.