CVE-2026-40856

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

Affected Software

VendorProductVersion RangeStatus
WNCT-Mobile 5G Box IDU0 < 1.1.0.651412affected

Weaknesses

  • CWE-306: CWE-306 Missing authentication for critical function

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References