Zero-Day Advisory

Fortinet Discovers Stack Buffer Overflows in DGN2200/DGN2200B


Fortinet's FortiGuard Labs has discovered multiple stack-based buffer overflows in Netgear DGN2200.

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

There are multiple Common Gateway Interface (CGI) handlers that do not sanitize user input submitted directly via HTTP request that could lead to stack-based buffer overflow, which could result in remote code execution upon successful exploitation.


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

Released Mar 15, 2018

Users should apply latest update from the vendor


Fortinet reported the vulnerability to Netgear on 06, February 2018

Netgear confirmed the vulnerability on 09, February 2018

Netgear released patch for the vulnerability on 12, March 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.