This indicates an attack attempt against a Directory Traversal vulnerability in Lexmark MarkVision.
The vulnerability is due to insufficient sanitizing of user supplied inputs when handling a crafted HTTP packet. It allows a remote attacker to create files in the affected machine and execute arbitrary code in the vulnerable machine via crafted requests.
Lexmark MarkVision Enterprise prior to v2.1
System Compromise: Remote attackers can gain control of vulnerable systems.
Currently we are unaware of any vendor supplied patch for this issue