Microsoft Internet Explorer 11 and Microsoft Edge mishandle cross-origin requests, which allows remote attackers to obtain sensitive information via a crafted web site, aka "Microsoft Browser Information Disclosure Vulnerability."
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-105
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-104
http://www.securitytracker.com/id/1036789