CVE-2025-52376
Critical
Description
An authentication bypass vulnerability in the /web/um_open_telnet.cgi endpoint in Nexxt Solutions NCM-X1800 Mesh Router firmware UV1.2.7 and below, allowing an attacker to remotely enable the Telnet service without authentication, bypassing security controls. The Telnet server is then accessible with hard-coded credentials, allowing attackers to gain administrative shell access and execute arbitrary commands on the device.
SeverityCritical
CVSS9.8
Exploit probability97. percentile13.8%
ProductNCM-X1800 Mesh Router firmware
PublishedJul 15, 2025
First seenJul 15, 2025
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Nexxt Solutions NCM-X1800 Mesh Router firmware | v ≤ UV1.2.7 | — |
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