This indicates an attack attempt against a Stack Buffer Overflow vulnerability in Easy File Management Web Server.
The vulnerability is due to insufficient sanitizing of user supplied inputs in the application when handling a crafted HTTP request. A remote attacker may be able to exploit this to execute arbitrary code within the context of the application, via a crafted request to the vulnerable service.
Easy File Management Web Server 5.3
Easy File Management Web Server 4.0
System Compromise: Remote attackers can execute arbitrary code in the context of the affected application.
Currently we are unaware of any vendor supplied patch for this issue.