🛡️ CVE-2026-31847
🟠 CVSS 8.8 — High ✅ No Known Exploit CWE-912 NVD
8.8
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity HIGH
CVSS Score 8.8
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE CWE-912
Public Exploit ✅ No
Source NVD
Published 2026-03-23
Updated 2026-06-02
Modified 2026-04-29
Fix URL N/A

Affected Packages

Software From version Fixed in
nebula300plus-firmware 12.01.01.37

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