This indicates an attack attempt to exploit an Elevation of Privileges vulnerability in Microsoft Windows Kernel.
The vulnerability is due to insufficient sanitizing of inputs in the application. A remote attacker can exploit this lead to elevation of privileges.
Windows RT 8.1
Windows Server 2008
Windows Server 2008 R2
Windows Server 2012
Windows Server 2012 R2
Privilege Escalation: Remote attackers can leverage their privileges on vulnerable systems.
Apply the most recent upgrade or patch from the vendor.