CVE-2026-40856 — Config disclosure in T-Mobile 5G Box IDU routers
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. I…
Published: 2026-09-16 · CVSS: 7.1 · CVSS 4.0
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
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7