This indicates an attack attempt to exploit a Type Confusion vulnerability in Microsoft Internet Explorer.
The vulnerability is due to an error when the vulnerable software attempts to handles maliciously crafted web page. An attacker can exploit this by tricking a user into visiting a malicious webpage and execute arbitrary code within the context of the application.
Internet Explorer 9
Internet Explorer 10
Internet Explorer 11
Internet Explorer 11 on Windows 10
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the most recent upgrade or patch from the vendor