cve/2021/CVE-2021-43711.md

### [CVE-2021-43711](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-43711)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brighgreen)

### Description

The downloadFlile.cgi binary file in TOTOLINK EX200 V4.0.3c.7646_B20201211 has a command injection vulnerability when receiving GET parameters. The parameter name can be constructed for unauthenticated command execution.

### POC

#### Reference
- https://github.com/doudoudedi/ToTolink_EX200_Cmmand_Execute/blob/main/ToTolink%20EX200%20Comand%20Injection2.md

#### Github
- https://github.com/ARPSyndicate/cvemon
- https://github.com/doudoudedi/ToTolink_EX200_Cmmand_Execute