CVE-2026-31847
Hidden Telnet Enablement in Nexxt Nebula 300+ Firmware
Publication date: 2026-03-23
Last updated on: 2026-04-29
Assigner: 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| nexxtsolutions | nebula300plus_firmware | to 12.01.01.37 (inc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-912 | The product contains functionality that is not documented, not part of the specification, and not accessible through an interface or command sequence that is obvious to the product's users or administrators. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability exists in the Nexxt Solutions Nebula 300+ firmware up to version 12.01.01.37. It involves hidden functionality in the /goform/setSysTools endpoint that allows an attacker to remotely enable a Telnet service on the device.
Once the Telnet service is enabled, it exposes a privileged diagnostic management interface over the network. This increases the device's attack surface and can lead to further compromise.
How can this vulnerability impact me? :
The vulnerability can impact you by allowing remote attackers to enable a Telnet service that exposes a privileged diagnostic management interface.
This increases the attack surface of the device, potentially allowing unauthorized access and further compromise of the device and its network.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
I don't know