cve/2021/CVE-2021-36765.md

### [CVE-2021-36765](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36765)
![](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

In CODESYS EtherNetIP before 4.1.0.0, specific EtherNet/IP requests may cause a null pointer dereference in the downloaded vulnerable EtherNet/IP stack that is executed by the CODESYS Control runtime system.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/buddybergman/Qualys-Get_QVS_Data