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NVD Vulnerability Details :
CVE-2026-31847
Analyzed
More InfoOfficial Page
Source-309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c
View Known Exploited Vulnerability (KEV) details
Published At-23 Mar, 2026 | 13:16
Updated At-29 Apr, 2026 | 17:46

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary4.08.5HIGH
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Primary3.18.8HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Type: Secondary
Version: 4.0
Base score: 8.5
Base severity: HIGH
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Type: Primary
Version: 3.1
Base score: 8.8
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CPE Matches
nexxtsolutions
nexxtsolutions
>>nebula300plus_firmware>>Versions up to 12.01.01.37(inclusive)
cpe:2.3:o:nexxtsolutions:nebula300plus_firmware:*:*:*:*:*:*:*:*
nexxtsolutions
nexxtsolutions
>>nebula300plus>>-
cpe:2.3:h:nexxtsolutions:nebula300plus:-:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-912Secondary309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c
CWE ID: CWE-912
Type: Secondary
Source: 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://nexxt-connectivity-frontend.s3.amazonaws.com/media/docs/Nebula300+_v12.01.01.37.zip309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c
Product
https://www.nexxtsolutions.com/connectivity/internal-products/ARN02304U6/309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c
Product
Hyperlink: https://nexxt-connectivity-frontend.s3.amazonaws.com/media/docs/Nebula300+_v12.01.01.37.zip
Source: 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c
Resource:
Product
Hyperlink: https://www.nexxtsolutions.com/connectivity/internal-products/ARN02304U6/
Source: 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c
Resource:
Product
Change History
0Changes found
Details not found