What is CVE-2026-31847?

CVE-2026-31847 is a high-severity vulnerability in Nexxt Solutions Nebula 300+, classified under Hidden Functionality. CVSS score: 8.8/10. Published 2026-03-23.

How severe is CVE-2026-31847?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Nexxt Solutions Nebula 300+

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 telnetMana…

EPSS: 0.001 (25.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Nexxt Solutions Nebula 300+ — versions <= 12.01.01.37
Nexxtsolutions Nebula300plus
Nexxtsolutions Nebula300plus_firmware

Weakness classification (CWE)

CWE-912 — Hidden Functionality

References

Official product page (Product)
Firmware download (Product)

Frequently asked questions

What is CVE-2026-31847?: CVE-2026-31847 is a high-severity vulnerability in Nexxt Solutions Nebula 300+, classified under Hidden Functionality. CVSS score: 8.8/10. Published 2026-03-23.
How severe is CVE-2026-31847?: High severity. CVSS v3 base score is 8.8 out of 10.