This indicates an attack attempt to exploit a Memory Corruption 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 application, via a crafted SWF file.
Adobe Flash Player 18.104.22.168 and earlier versions for Windows and Macintosh
Adobe Flash Player 22.214.171.124 and earlier versions for Linux installed with Google Chrome
Adobe Flash Player Extended Support Release version 126.96.36.1992 and earlier 13.x versions for Windows and Macintosh
Adobe Flash Player Extended Support Release version 188.8.131.521 and earlier 11.x versions for Linux
System Compromise: Remote attackers can gain control of vulnerable system.
Apply the most recent upgrade or patch from the vendor.