cve/2021/CVE-2021-31756.md

### [CVE-2021-31756](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-31756)
![](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 on Tenda AC11 devices with firmware through 02.03.01.104_CN. A stack buffer overflow vulnerability in /gofrom/setwanType allows attackers to execute arbitrary code on the system via a crafted post request. This occurs when input vector controlled by malicious attack get copied to the stack variable.

### POC

#### Reference
- https://github.com/Yu3H0/IoT_CVE/tree/main/Tenda/CVE_1

#### Github
- https://github.com/20142995/nuclei-templates
- https://github.com/Yu3H0/IoT_CVE
- https://github.com/cyb3r-w0lf/nuclei-template-collection