VULNERABILITY INTELLIGENCE

CVE-2026-31847

CVSS score8.8 HIGH
EPSS probability0.45%
CISA KEVNot currently listed
Published2026-03-23
Last modified2026-08-10
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

Weakness classification

  • 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c: CWE-912

Primary references