Zero-Day Advisory

Fortinet Discovers Netgear USB Device CGI Handler Stack Buffer Overflow


Fortinet's FortiGuard Labs has discovered post authentication stack buffer overflow vulnerability in Netgear routers.

Netgear is a global computer networking company based in San Jose, California, in the United States. It produces networking hardware for consumers, businesses, and service providers

The routers suffer stack-based buffer overflow vulnerability that occurs when arbitrary USB device name is sent to CGI handler. Remote code execution can be achieved upon successful exploitation.


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

Released Jul 02, 2018

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Fortinet reported the vulnerability to Netgear on 29, May 2018

Netgear confirmed the vulnerability on 30, May 2018

Netgear released patch for the vulnerability on 04, September 2019


This vulnerability was discovered by Wayne Low 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.