CVEs-PoC/2021/CVE-2021-4242.md

### [CVE-2021-4242](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4242)
![](https://img.shields.io/static/v1?label=Product&message=BR270n&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=BRC76n&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=GR297&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=RB1732&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-707%20Improper%20Neutralization%20-%3E%20CWE-74%20Injection%20-%3E%20CWE-78%20OS%20Command%20Injection&color=brighgreen)

### Description

A vulnerability was found in Sapido BR270n, BRC76n, GR297 and RB1732 and classified as critical. Affected by this issue is some unknown functionality of the file ip/syscmd.htm. The manipulation leads to os command injection. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-214592.

### POC

#### Reference
- https://blog.csdn.net/qq_44159028/article/details/114590267
- https://vuldb.com/?id.214592

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