This indicates an attack attempt to exploit a Heap-Based Buffer Overflow Vulnerability in Foxit Software Foxit Reader.
The vulnerability is due to an error in the vulnerable application when handling a maliciously crafted file. A remote attacker may be able to exploit this to execute arbitrary code within the context of the application, via a crafted file.
Foxit Software Foxit Reader 18.104.22.1689 and prior
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the most recent upgrade or patch from the vendor: