CyberRota Analysis
This is a high severity vulnerability with a CVSS score of 8.8. It may be remotely exploitable. Exploitation may require the attacker to be authenticated.
CVE
CVE-2026-31847
Severity
HIGH
CVSS
8.8
EPSS
0.42%
Original NVD 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.
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