### [CVE-2021-39509](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-39509)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brightgreen)

### Description

An issue was discovered in D-Link DIR-816 DIR-816A2_FWv1.10CNB05_R1B011D88210 The HTTP request parameter is used in the handler function of /goform/form2userconfig.cgi route, which can construct the user name string to delete the user function. This can lead to command injection through shell metacharacters.

### POC

#### Reference
- https://github.com/doudoudedi/main-DIR-816_A2_Command-injection
- https://github.com/doudoudedi/main-DIR-816_A2_Command-injection/blob/main/injection.md
- https://www.dlink.com/en/security-bulletin/

#### Github
No PoCs found on GitHub currently.