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 SWF file. A remote attacker may be able to exploit this to execute arbitrary code within the context of the affected application, via a crafted SWF file.
Adobe Flash Player 188.8.131.52 and earlier versions
Adobe Flash Player 184.108.40.206 and earlier 13.x versions
Adobe Flash Player 220.127.116.116 and earlier versions for Linux
Adobe AIR desktop runtime 18.104.22.168 and earlier versions
Adobe AIR SDK 22.214.171.124 and earlier versions
Adobe AIR SDK & Compiler 126.96.36.199 and earlier versions
Adobe AIR 188.8.131.52 and earlier versions for Android
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the most recent upgrade or patch from the vendor.