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. Also a remote attacker can exploit this vulnerability to cause denial of service conditions.
Ericom AccessNow Server prior to 18.104.22.16895
System Compromise: Remote attackers can execute arbitrary code in the context of the affected application.
Denial of Service: Remote attackers can crash vulnerable systems.
Apply the most recent upgrade or patch from the vendor.