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. Once enabled, the service exposes a privileged diagnostic management interface over the network, increasing the attack surface and enabling further compromise of the device.

Attack Vector Adjacent Network

Attack Complexity Low

Privileges Required High

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact total

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Nexxt Solutions Nebula 300+ unaffected
Version Status Constraints
<= 12.01.01.37 affected
≤ Nebula300+_v12.01.01.37

No data.

No data.

No data.

Subscriptions

No data.

Tracking

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://nexxt-connectivity-frontend.s3.amazonaws.com/media/docs/Nebula300+_v12.01.01.37.zip cve-icon cve-icon
https://www.nexxtsolutions.com/connectivity/internal-products/ARN02304U6/ cve-icon cve-icon
History

Mon, 23 Mar 2026 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Mon, 23 Mar 2026 12:45:00 +0000

Type Values Removed Values Added
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. Once enabled, the service exposes a privileged diagnostic management interface over the network, increasing the attack surface and enabling further compromise of the device.
Title Hidden functionality allows remote Telnet enablement in Nexxt Nebula 300+
Weaknesses CWE-912
References
Metrics cvssV4_0

{'score': 8.5, 'vector': 'CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}
cve-icon MITRE

Status: PUBLISHED

Assigner: TuranSec

Published:

Updated: 2026-03-23T15:52:16.990Z

Reserved: 2026-03-09T18:20:23.399Z

Link: CVE-2026-31847

cve-icon Vulnrichment

Updated: 2026-03-23T15:16:38.580Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-03-23T13:16:30.320

Modified: 2026-03-23T14:31:37.267

Link: CVE-2026-31847

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses