CVE-2025-52376
9.8
CRITICAL · CVSS 3.1 · EPSS 11.2% (pctl 96)
Patch early
EPSS 11.2% — above the 10% action threshold.
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.
Scoring
| CVSS | 9.8 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 11.16% — more likely to be exploited than 96% of all CVEs |
| Weakness | CWE-287 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2025-07-15 |
| Last modified | 2026-06-17 |
References
→ the Explorer · watch your stack · NVD