Description

Hidden functionality in the /goform/setSysTools endpoint in Nexxt Solutions Nebula 300+ firmware through version 12.01.01.37 allows remote enablement of a Telnet service. By sending a crafted POST request with parameters such as telnetManageEn=true and telnetPwd, an authenticated attacker can activate a Telnet service on port 23. This exposes a privileged diagnostic interface that is not intended for external access and can be used to interact with the underlying system.

INFO

Published Date :

2026-03-23T12:07:05.062Z

Last Modified :

2026-03-26T10:52:50.115Z

Source :

TuranSec
AFFECTED PRODUCTS

The following products are affected by CVE-2026-31847 vulnerability.

Vendors Products
Nexxtsolutions
  • Nebula300+
  • Nebula300plus
  • Nebula300plus Firmware
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-31847.

URL Resource
https://nexxt-connectivity-frontend.s3.amazonaws.com/media/docs/Nebula300+_v12.01.01.37.zip cve-icon cve-icon
https://www.nexxtsolutions.com/connectivity/internal-products/ARN02304U6/ cve-icon cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Attack Requirements
Privileges Required
User Interaction
VS Confidentiality
VS Integrity
VS Availability
SS Confidentiality
SS Integrity
SS Availability
Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact