Is CVE-2026-31847 in the CISA KEV catalog?

No. CVE-2026-31847 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-31847?

CVE-2026-31847 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2026-31847?

CVE-2026-31847 has an EPSS score of 0.42% (35th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix or mitigate CVE-2026-31847?

No published fix for CVE-2026-31847 has been found yet. Check the linked vendor advisories for guidance as it becomes available.

CVE & CISA-KEV Catalog

CVE-2026-31847

HIGH

8.8

CVSS v3

NVD

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. This exposes a privileged diagnostic interface that is not intended for external access and can be used to interact with the underlying system.

CWE-912

How to fix

No published remediation has been found for this vulnerability's affected products yet.

Mitigation guidance may be in the linked vendor advisories in the References section below.

TridentStack Control tracks known vulnerabilities across your Windows, macOS, and Linux fleet and shows the fix as soon as one is published. See how it works

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

0.42%probability of exploitation in 30 days

35thpercentile

Low risk: more likely to be exploited than 35% of all known CVEs.

References

Product2

Related Vulnerabilities

Other CWE-912 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-20439	Critical	9.8	92%	KEV	Fix
CVE-2025-34117	Unscored	-	23%	-	-
CVE-2021-24867	Critical	9.8	19%	-	Fix
CVE-2024-6045	High	8.8	6.3%	-	-
CVE-2020-16204	Critical	9.8	5.5%	-	-
CVE-2010-20103	Critical	9.8	4.8%	-	-

Embed a live status badge for CVE-2026-31847

Markdown

[![CVE-2026-31847](https://tridentstack.com/cve/badge/CVE-2026-31847.svg)](https://tridentstack.com/cve/CVE-2026-31847)

HTML

<a href="https://tridentstack.com/cve/CVE-2026-31847"><img src="https://tridentstack.com/cve/badge/CVE-2026-31847.svg" alt="CVE-2026-31847"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

See how it works Start freeThis CVE lookup is free and always will be.

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-29.