CVE-2026-40854highCWE-290

CVE-2026-40854: fallo de gravedad alta en WNC T-Mobile 5G Box IDU

Session auth bypass via cookie value in T-Mobile 5G Box IDU routers

Publicada el

Seguir esta CVE+ Monitorear T-Mobile 5G Box IDU

Aviso por correo cuando entre en el KEV, tenga PoC pública o suba de nota.

21Vexday Risk Score

Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.

ssvc Trackcvss 8.7epss 0.3%
WNC T-Mobile 5G Box IDU router contains an authentication bypass vulnerability in the portal.cgi component. The session verification mechanism improperly validates the sessionid cookie by checking for the existence of a corresponding file in /tmp/login_user. An attacker can bypass authentication by using directory entries such as "." or ".." in the cookie, allowing unauthorized access to the administration panel.This issue has been fixed in firmware version 1.1.0.651412
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Productos afectados
WNC · T-Mobile 5G Box IDU
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