This indicates an attack attempt to exploit a Security Bypass vulnerability in Adobe Flash Player.
The vulnerability is due to an error when the vulnerable software handles a maliciously crafted SWF file. An attacker can exploit this by tricking an unsuspecting user into visiting a malicious webpage, leading to other attacks.
Adobe Flash Player 126.96.36.199 and earlier versions for Windows and Macintosh
Adobe Flash Player 188.8.131.528 and earlier versions for Linux
Adobe AIR 184.108.40.206 SDK and earlier versions
Adobe AIR 220.127.116.11 SDK & Compiler and earlier versions
Adobe AIR 18.104.22.168 and earlier versions for Android
Security Bypass: Remote attackers can bypass security checks of vulnerable systems.
Apply the most recent upgrade or patch from the vendor.