This indicates an attack attempt to exploit a Remote Code Execution vulnerability in Dell KACE K1000 Systems Management Appliance.
The vulnerability is due to insufficient sanitizing of user supplied inputs. A remote attacker may be able to exploit this to execute arbitrary commands within the context of the application, via a crafted HTTP request.
Dell KACE K1000 prior to version 6.4 SP3 (6.4.120822)
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the most recent upgrade or patch from the vendor: