This indicates a vulnerability in the WebEx ActiveX Control, which can be exploited by remote attackers to take complete control of an affected system.
The flaw is due to input validation errors when handling the "GpcUrlRoot" and "GpcIniFileName" parameters. It can be exploited by remote attackers to download and execute malicious components by tricking a user into visiting a specially crafted web page.
WebEx ActiveX Control versions prior to 126.96.36.199
Upgrade to version 188.8.131.52 :