CVE-2025-52376

CRITICAL EPSS 94.7%
Published Jul 15, 202511mo ago · Modified Jun 17, 20262w ago
9.8 CVSS 3.1
Critical
Find Similar
Published Jul 15, 2025 11mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
9.8
Exploitability
3.9
Impact
5.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
94.7% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 2

CWE-287 Improper Authentication Authentication
CWE-798 Use of Hard-coded Credentials Authentication

References 2

  • github.com https://github.com/Vagebondcur/nexxt-solutions-NCM-X1800-exploits
  • github.com https://github.com/Vagebondcur/nexxt-solutions-NCM-X1800-exploits/blob/main/CVE-2025-52376/writeup.md

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.