This indicates an attack attempt to exploit a Memory Corruption vulnerability in Microsoft Jscript and VBScript engine.
The vulnerability is due to an error when the vulnerable software handles a maliciously crafted HTML file. An attacker can exploit this by tricking an unsuspecting 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
JScript 5.8 and VBScript 5.8
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the most recent upgrade or patch from the vendor.