Windows Search in Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016 allows a remote code execution vulnerability when it improperly handles objects in memory, aka "Windows Search Remote Code Execution Vulnerability".
https://threatpost.com/windows-search-bug-worth-watching-and-squashing/127434/
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8620