This indicates an attack attempt to exploit an Arbitrary File Upload Vulnerability in Trend Micro Threat Discovery Appliance.
The vulnerability is due to an error in the vulnerable application when handling a maliciously crafted request. A remote attacker may be able to exploit this to execute arbitrary code within the context of the application, via a crafted request.
Trend Micro Threat Discovery Appliance versions 2.6.1062r1 and prior
System Compromise: Remote attackers can execute arbitrary command execution under the security context of the root user.
We currently are unaware of any vendor supplied patches for this issue.