This indicates an attack attempt to exploit a Privilege Escalation vulnerability in Microsoft Windows Task Scheduler.
This vulnerability is due to the insufficient permission checking in the application. A remote attacker may be able to exploit this bug to escalate his/her privileges via a crafted file.
Microsoft Windows 64-bit versions
Privilege Escalation: Remote attackers can leverage their privilege on the vulnerable systems
Currently we are not aware of any vendor supplied patch for this issue