CVE Catalog

CVE-2026-40857

HighCVSS 8.4
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.20%

8th percentile - higher than 8% of all known CVEs

Summary

The 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, allowing a remote attacker to perform unauthorized actions on the device.

Risk Assessment

An attacker can trick an authenticated user into visiting a malicious website and perform unauthorized operations on the router on their behalf, potentially leading to device configuration changes.

Recommendation

Update the router firmware to version 1.1.0.651412 or later, which fixes this vulnerability.

Related vulnerabilities

Original NVD description (English source)

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

Vulnerability data from NVD (NIST) · CISA KEV · EPSS