Microsoft Internet Explorer 10 and 11 allows local users to bypass the Protected Mode protection mechanism, and consequently gain privileges, by leveraging the ability to execute sandboxed code, aka "Internet Explorer Elevation of Privilege Vulnerability."
https://euvd.enisa.europa.eu/vulnerability/EUVD-2013-4887
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-097
http://www.exploit-db.com/exploits/33893
http://packetstormsecurity.com/files/127245/MS13-097-Registry-Symlink-IE-Sandbox-Escape.html