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    CVE-2026-31847

    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.

    Published:Mar 23, 2026
    Last Modified:Aug 10, 2026
    EPS:Mar 23, 2026
    EPSS Score:0.00424
    CVSS Score:8.8

    Affected Products

    Vendor
    Nexxtsolutions
    Product
    Nebula300+
    Vendor
    Nexxtsolutions
    Product
    Nebula300plus
    Vendor
    Nexxtsolutions
    Product
    Nebula300plus Firmware

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-912 Hidden Functionality

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High