High severityNVD Advisory· Published Sep 16, 2026

CVE-2026-40857

Description

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

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

WNC/T-Mobile 5G Box IDU routerllm-fuzzy
Range: = 1.1.0.651412

Patches

Vulnerability mechanics

References

cert.pl/posts/2026/09/CVE-2026-40854nvd

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