Fortinet Discovers Cisco WebEx Network Recording Player Out-of-Bound Read Vulnerability


Fortinet's FortiGuard Labs has discovered an Out-of-Bound Read vulnerability in Cisco Network Recording Player.

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

The discovered Out-of-Bound Read vulnerability in Cisco Webex Network Recording Player could allow an unauthenticated attacker to access sensitive data about the application. An attacker could exploit this vulnerability to gain information about the system memory state that could allow the attacker to conduct further attacks.


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

Released Oct 28, 2021

The vendor didn't provide solution or workaround for it.


Fortinet reported the vulnerability to Cisco Systems on August 31, 2021. 

Cisco Systems confirmed the vulnerability on September 9, 2021.

Cisco Systems disclosed the vulnerability on October 28, 2021.


This vulnerability was discovered by Yonghui Han 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.