Zero-Day Advisory

Fortinet Discovers Cisco WebEx Player Memory Corruption Vulnerability II


Fortinet's FortiGuard Labs has discovered a memory corruption vulnerability in Cisco WebEx Player.

Cisco WebEx Player is a free tool to watch, share, and edit Cisco WebEx recordings developed and published by Cisco Systems for macOS and Windows.

A memory corruption vulnerability has been discovered in Cisco WebEx Player. The vulnerability is caused by a crafted wrf file which causes an out of bounds memory write.


FortiGuard Labs released the following FortiGate IPS signature which covers this specific vulnerability:

Released May 23, 2018

Users should apply the solution provided by Cisco Systems.


Fortinet reported the vulnerability to Cisco on January 21, 2018.

Cisco confirmed the Vulnerability on April 17, 2018.

Cisco released the Patch for it on July 18, 2018.


This vulnerability was discovered by Chris Navarrete of Fortinet's FortiGuard Labs.

IPS Subscription

Fortinet customers who subscribe to Fortinet's intrusion prevention (IPS) service should be protected against this vulnerability with the appropriate configuration parameters in place. Fortinet's IPS service is one component of FortiGuard Subscription Services, which also offer comprehensive solutions such as antivirus, Web content filtering and antispam capabilities. These services enable protection against threats on both application and network layers. FortiGuard Services are continuously updated by FortiGuard Labs, which enables Fortinet to deliver a combination of multi-layered security intelligence and true zero-day protection from new and emerging threats. These updates are delivered to all FortiGate, FortiMail and FortiClient products. Fortinet strictly follows responsible disclosure guidelines to ensure optimum protection during a threat's lifecycle.