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 JPEG XR file. A remote attacker may be able to exploit this to execute arbitrary code within the context of the affected application, via a crafted JPEG XR file.
Adobe Flash Player Desktop Runtime 22.214.171.124 and earlier Windows and Macintosh
Adobe Flash Player Extended Support Release 126.96.36.1997 and earlier Windows and Macintosh
Adobe Flash Player for Google Chrome 188.8.131.52 and earlier Windows, Macintosh and Linux
Adobe Flash Player for Internet Explorer 10 and Internet Explorer 11 184.108.40.206 and earlier Windows 8.0 and 8.1
Adobe Flash Player 220.127.116.111 and earlier Linux
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the most recent upgrade or patch from the vendor.