This indicates an attack attempt to exploit a Buffer Overflow vulnerability in BlueZone Desktop.
The vulnerability is due to an improper boundary check condition in the application when handling a malformed ZAP file. A remote attacker may be able to exploit this to execute arbitrary code within the context of the application, via a crafted ZAP file.
BlueZone Desktop 5.2C2 Build 1554
System Compromise: Remote attackers can gain control of vulnerable systems.
Currently we are unaware of any vendor supplied patch or updates available for this issue.