CVE-2026-40856NVD

Vulnerability Summary

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

Severity Level

UNKNOWN

Published Date

Sep 16, 2026

Last Modified

Sep 16, 2026

Exploitation Status

No confirmed exploitation yet

EPSS Score (30-Day)

0.37%Probability

Root Weakness (CWE)

CWE-306: Unknown/Unlisted Weakness ↗

Refer to the official MITRE database for detailed architectural specifications regarding this weakness.

CVSS v4.0 Base Metrics — Score 7.1 (HIGH)

Attack VectorAdjacent

Attack ComplexityLow

Attack RequirementsNone

Privileges RequiredNone

User InteractionNone

Confidentiality (Vulnerable System)High

Integrity (Vulnerable System)None

Availability (Vulnerable System)None

Confidentiality (Subsequent System)None

Integrity (Subsequent System)None

Availability (Subsequent System)None

Affected & Patched Versions

Affected Versions

WNC T-Mobile 5G Box IDU < 1.1.0.651412

Patched Versions

WNC T-Mobile 5G Box IDU 1.1.0.651412

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