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.
Question to Ask Vendors:
- Can you confirm whether your systems are affected by CVE-2025-52376, and if so, what steps are you currently taking to mitigate this vulnerability?
- What is your estimated timeline for fully resolving CVE-2025-52376 in your products or services, and how will you communicate updates on this issue to us as your customer?
Recommended Actions:
- Check out the advisory links provided below.
References:
- http://webappsec.pbworks.com/Insufficient-Authentication
- https://capec.mitre.org/data/definitions/114.html
- https://capec.mitre.org/data/definitions/115.html
- https://capec.mitre.org/data/definitions/151.html
- https://capec.mitre.org/data/definitions/194.html
- https://capec.mitre.org/data/definitions/22.html
- https://capec.mitre.org/data/definitions/57.html
- https://capec.mitre.org/data/definitions/593.html
- https://capec.mitre.org/data/definitions/633.html
- https://capec.mitre.org/data/definitions/650.html
- https://capec.mitre.org/data/definitions/94.html
- https://nvd.nist.gov/vuln/detail/CVE-2025-52376