This indicates an attack attempt against a Memory Corruption vulnerability in Adobe Flash Player.
The vulnerability is caused by an error when the vulnerable software handles a malicious FLV file. A remote attacker may be able to exploit this to execute arbitrary code within the context of the application, via a crafted FLV file.
Adobe Flash Player 11.5.502.135
System Compromise: Remote attackers can gain control of vulnerable systems.
Currently we are unaware of any vendor supplied patch for this issue.