{"id":"CVE-2025-52376","aliases":["EUVD-2025-21439","GHSA-932h-pf5w-9584"],"status":"published","title":"An authentication bypass vulnerability in the /web/um_open_telnet.cgi endpoint in Nexxt Solutions...","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.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-10","score":0.13769,"percentile":0.96542,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-287","CWE-798"],"published":"2025-07-15T00:00:00Z","modified":"2026-06-17T09:36:26Z","references":[{"url":"https://github.com/Vagebondcur/nexxt-solutions-NCM-X1800-exploits"},{"url":"https://github.com/Vagebondcur/nexxt-solutions-NCM-X1800-exploits/blob/main/CVE-2025-52376/writeup.md"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-52376"},{"url":"https://github.com/advisories/GHSA-932h-pf5w-9584"}],"sources":{"cve":[{"id":"CVE-2025-52376","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.","status":"published","published":"2025-07-15T00:00:00Z","modified":"2025-07-15T14:23:54.882Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"adp"}],"cwes":["CWE-287","CWE-798"],"updated_at":"2026-11-02T14:32:31.309974Z"}],"euvd":[{"id":"EUVD-2025-21439","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.","status":"published","published":"2025-07-15T00:00:00Z","modified":"2025-07-15T14:23:54Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T20:32:08.210064Z"}],"ghsa":[{"id":"GHSA-932h-pf5w-9584","title":"An authentication bypass vulnerability in the /web/um_open_telnet.cgi endpoint in Nexxt Solutions...","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.","status":"published","published":"2025-07-15T15:31:00Z","modified":"2025-07-15T15:31:06Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T15:03:01.086006Z"}],"nvd":[{"id":"CVE-2025-52376","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.","status":"published","published":"2025-07-15T14:15:30.54Z","modified":"2026-06-17T09:36:26.627Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-287","CWE-798"],"updated_at":"2026-11-02T14:11:18.285862Z"}]}}