CVE-2026-31847HIGH 8.8EPSS p50.8%

CVE-2026-31847CVE-2026-31847

nexxtsolutions / nebula300plus_firmware

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.

Scoring

CVSS 3.18.8 (HIGH)
VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS0.68% probability of exploitation · percentile 50.8% · 2026-10-05T12:00:23Z
Published2026-03-23
Last modified2026-08-10

Underlying weaknesses· 1

CWE-912

References

  1. https://nexxt-connectivity-frontend.s3.amazonaws.com/media/docs/Nebula300+_v12.01.01.37.zip
  2. https://www.nexxtsolutions.com/connectivity/internal-products/ARN02304U6/

1

TypeTargetConfidenceTier
WeaknessHidden Functionalitycwe-9120%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.