This indicates an attack attempt against a Denial of Service vulnerability in Citrix EdgeSight.
The vulnerability is caused by an error when the software handles a malicious packet. It allows a remote attacker to cause a Denial of Service via sending a crafted packet.
Citrix EdgeSight For Load Testing version 18.104.22.168
Denial of Service: Remote attackers can crash vulnerable systems.
Refer to the vendor's website for suggested workaround.