This indicates an attack attempt to exploit a Remote Code Execution vulnerability in Adobe Flash Player.
The vulnerability is due to an error when the vulnerable software handles a maliciously crafted flash file. A remote attacker may be able to exploit this to execute arbitrary code within the context of the application, via a crafted flash file.
Adobe Flash Player 126.96.36.199 and earlier versions
Adobe Flash Player 188.8.131.52 and earlier 13.x versions
Adobe AIR desktop runtime 184.108.40.2063 and earlier versions
Adobe AIR SDK 220.127.116.112 and earlier versions
System Compromise: Remote attackers can gain control of vulnerable systems.
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