This indicates an attack attempt against a Memory Corruption vulnerability in Adobe Photoshop CC.
The vulnerability is due to an error when the vulnerable software handles a maliciously crafted PCX files. A remote attacker may be able to exploit this to execute arbitrary code within the context of the application, via a crafted PCX file.
Adobe Photoshop CC 2017 18.0.1 and earlier versions
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the latest update from the vendor.