CVE-2026-40856

UNKNOWN

Description

WNC T-Mobile 5G Box IDU router is vulnerable to improper access control. The vulnerability exists in the wnc_maccheck.cgi endpoint, which is accessible without authentication. It allows a remote attacker to retrieve sensitive configuration data, including the administrator web password, WiFi passphrase, and technical device information.This issue has been fixed in firmware version 1.1.0.651412

Timeline

Published:September 16th, 2026 12:17 PM

Last modified:September 28th, 2026 11:10 PM

CVSS Scoring

No CVSS v3 score available

Weaknesses (CWE)

CWE-306

References & Reports

Advisories, patches, and third-party reports

https://cert.pl/posts/2026/09/CVE-2026-40854

Source: NIST NVD · Data may lag official sources by up to one minute