The XSS Filter in Microsoft Internet Explorer 9 through 11 and Microsoft Edge does not properly restrict JavaScript code, 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/ms16-085
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-084