CVE-2026-40857: high-severity vulnerability in WNC T-Mobile 5G Box IDU
CSRF token bypass in T-Mobile 5G Box IDU routers
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.4epss 0.2%
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:4.0/AV:A/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N
Affected products
WNC · T-Mobile 5G Box IDURelated CVEs — WNC T-Mobile 5G Box IDU
In the same product, most dangerous first.
CVE-2026-58146CRITICALUnauthorized remote code execution in T-Mobile 5G Box IDU routersEPSS 2.9%CVE-2026-40855CRITICALCommand Injection in T-Mobile 5G Box IDU router via ping functionalityEPSS 1.6%CVE-2026-58147CRITICALAuthorized remote code execution via password change functionality in T-Mobile 5G Box IDU routersEPSS 1.6%CVE-2026-40856HIGHConfig disclosure in T-Mobile 5G Box IDU routersEPSS 0.4%CVE-2026-40854HIGHSession auth bypass via cookie value in T-Mobile 5G Box IDU routersEPSS 0.3%