This indicates an attempt to exploit a Memory Corruption vulnerability in Adobe Shockwave Player.
This vulnerability is due to an error that occurs when the vulnerable software handles a malformed DIR file. An attacker may exploit this to execute arbitrary code via a crafted DIR file.
Adobe Shockwave Player 18.104.22.168 and earlier
System Compromise: Remote attackers can gain control of vulnerable systems.
Refer to the vendor's advisory for updates: