CVE-2026-40856

Vulnerability 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

Related Weaknesses (CWE)

CWE-306

References

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

FAQ

What is CVE-2026-40856?

CVE-2026-40856 is a documented vulnerability. 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 attac...

How severe is CVE-2026-40856?

CVSS scoring is not yet available for CVE-2026-40856. Check NVD for updates.

Is there a patch for CVE-2026-40856?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.