This indicates an attack attempt to exploit an Elevation of Privileges vulnerability in Microsoft Browser IE and EDGE.
The vulnerability is due to insufficient sanitizing of inputs in the application. A remote attacker can exploit this lead to elevation of privileges.
Internet Explorer 10
Internet Explorer 11
Internet Explorer 11 on Windows 10
Privilege Escalation: Remote attackers can leverage their privileges on vulnerable systems.
Apply the most recent upgrade or patch from the vendor.