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 Desktop Runtime 188.8.131.52 and earlier for Windows and Macintosh
Adobe Flash Player Extended Support Release 184.108.40.2068 and earlier for Windows and Macintosh
Adobe Flash Player for Google Chrome 220.127.116.11 and earlier for Windows, Macintosh, Linux and ChromeOS
Adobe Flash Player for Microsoft Edge and Internet Explorer 11 18.104.22.168 and earlier for Windows 10
Adobe Flash Player for Internet Explorer 10 and 11 22.214.171.124 and earlier for Windows 8.0 and 8.1
Adobe Flash Player for Linux 126.96.36.1994 and earlier for Linux
AIR Desktop Runtime 188.8.131.52 and earlier for Windows and Macintosh
AIR SDK 184.108.40.206 and earlier for Windows, Macintosh, Android and iOS
AIR SDK & Compiler 220.127.116.11 and earlier for Windows, Macintosh, Android and iOS
AIR for Android 18.104.22.168 and earlier for Android
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the most recent upgrade or patch from the vendor.