Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 36.3%
CVSS Severity
CVSS v3 Score 8.8
References
Products affected by CVE-2026-31847
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cpe:2.3:h:nexxtsolutions:nebula300plus:-
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cpe:2.3:o:nexxtsolutions:nebula300plus_firmware:*