Vulnerability intelligence

CVE-2026-40857

WNC T-Mobile 5G Box IDU CWE-352

WNC T-Mobile 5G Box IDU router contains a cross-site request forgery (CSRF) vulnerability in the portal.cgi component. The anti-CSRF mechanism fails to validate the csrf_token_value parameter, accepting any arbitrary value as valid. This allows a remote attacker to perform unauthorized actions on the device by tricking an authenticated user into visiting a malicious website.This issue has been fixed in firmware version 1.1.0.651412

CVSS Score

8.4

High

EPSS — Exploit Probability

—

Awaiting FIRST.org data · checked 2026-09-17

Exploitation

Not in CISA KEV

KEV does not include every exploited vulnerability

Remediation

unknown

Check vendor advisories