Microsoft Internet Explorer 9 through 11 and Microsoft Edge allow remote attackers to determine the existence of unspecified files via a crafted web site, aka "Microsoft Browser Information Disclosure Vulnerability."
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-119
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-118
http://www.securitytracker.com/id/1036993