Microsoft Internet Explorer 9 through 11 and Edge allow remote attackers to determine the existence of files via a crafted webpage, aka "Internet Explorer Information Disclosure Vulnerability."
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-096
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-095