CVE-2025-52376

CriticalCVSS 9.8/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-287 CWE-798

Affected software

No affected versions have been published.

Timeline

Published: Jul 15, 2025
Last modified: Jun 17, 2026
NVD status: Deferred

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