This indicates an attack attempt against a Buffer Overflow vulnerability in the Edraw PDF Viewer Component ActiveX control.
The vulnerability is caused by an error when the software handles a specially crafted argument to the "FtpConnect" method. It allows a remote attacker to execute arbitrary code.
Versions prior to PDF Viewer Component 126.96.36.199 are vulnerable.
System Compromise: Remote attackers can gain control of vulnerable systems.
Upgrade to the latest version, available from the website: