### [CVE-2021-21967](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21967)
![](https://img.shields.io/static/v1?label=Product&message=SeaConnect%20370W&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3D%20v1.3.34%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-120%3A%20Buffer%20Copy%20without%20Checking%20Size%20of%20Input%20('Classic%20Buffer%20Overflow')&color=brighgreen)

### Description

An out-of-bounds write vulnerability exists in the OTA update task functionality of Sealevel Systems, Inc. SeaConnect 370W v1.3.34. A specially-crafted MQTT payload can lead to denial of service. An attacker can perform a man-in-the-middle attack to trigger this vulnerability.

### POC

#### Reference
- https://talosintelligence.com/vulnerability_reports/TALOS-2021-1394

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