Paper/Archive/CVE-2026-58146

CVE-2026-58146

WNC T-Mobile 5G Box IDU — Unauthorized remote code execution in T-Mobile 5G Box IDU routers

CVSS 9.4 (CNA)9.4 / 10 × 3028.2 Not in CISA KEV+300.0 EPSS percentile 86.9.869 × 2017.4 No public exploit+100.0 SSVC exploitation: none+100.0

Description · from the CVE record

WNC T-Mobile 5G Box IDU router is vulnerable to OS command injection vulnerability. The vulnerability exists within the /cgi-bin/portal.cgi endpoint, specifically through the cli_cookie POST parameter. The cli_cookie parameter value is directly concatenated into a find command string without proper sanitization. This allows a remote, unauthenticated attacker to inject and execute arbitrary shell commands as root on the underlying operating system. This issue has been fixed in firmware version 1.1.0.651412

Affected

ProductAffectedFixed inSource

T-Mobile 5G Box IDU< 1.1.0.6514121.1.0.651412CNA

Scores by source

CERT-PL (CNA)9.4CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

writeupcert.pl/posts/2026/09/CVE-2026-40854