This indicates an attack attempt to exploit a Buffer Overflow vulnerability in Flexense DiskPulse.
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 HTTP request.
Flexense DiskPulse 10.1.18 and prior
Flexense DiskPulse Enterprise 10.1.18 and prior
Flexense DiskPulse Pro 10.1.18 and prior
Flexense DiskPulse Server 10.1.18 and prior
Flexense DiskPulse Ultimate 10.1.18 and prior
System Compromise: Remote attackers can gain control of vulnerable systems.
Upgrade to the latest version, available from the web site.