Windows Media Player in Microsoft Windows 8.1; Windows Server 2012 R2; Windows RT 8.1; Windows 7 SP1; Windows 2008 SP2 and R2 SP1, Windows Server 2016; Windows Vista SP2; and Windows 10 Gold, 1511, and 1607 allows remote attackers to obtain sensitive information via a crafted web site, aka "Windows Media Player Information Disclosure Vulnerability."
https://twitter.com/Qab/status/842506404950917120
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-0042
http://www.securitytracker.com/id/1038016