### [CVE-2021-22699](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-22699)
![](https://img.shields.io/static/v1?label=Product&message=Modicon%20M241%2FM251%20logic%20controllers%20firmware%20prior%20to%20V5.1.9.1&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=Modicon%20M241%2FM251%20logic%20controllers%20firmware%20prior%20to%20V5.1.9.1%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-20%3A%20Improper%20Input%20Validation&color=brightgreen)

### Description

Improper Input Validation vulnerability exists in Modicon M241/M251 logic controllers firmware prior to V5.1.9.1 that could cause denial of service when specific crafted requests are sent to the controller over HTTP.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/n0-traces/cve_monitor