Microsoft Internet Explorer add-on Installer Sandbox Escape Vulnerability

This vulnerability allows remote attackers to escape Enhanced Protected Mode on vulnerable installations of Microsoft Internet Explorer. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the usage of the add-on installer. An attacker can bypass checks within the add-on installer with special paths and junction points to achieve medium-integrity code execution under the context of the user.