CVE-2026-40855 (GCVE-0-2026-40855)
Vulnerability from cvelistv5 – Published: 2026-09-16 11:21 – Updated: 2026-09-16 16:01
VLAI
EPSS
VEX
Title
Command Injection in T-Mobile 5G Box IDU router via ping functionality
Summary
WNC T-Mobile 5G Box IDU router is vulnerable to a command injection. The vulnerability exists in the ping functionality within the /cgi-bin/portal.cgi endpoint, specifically affecting the ping_ip, ping_size, and ping_times POST parameters. The root cause is the failure to verify and sanitize user-supplied input before incorporating it into a system command. This allows an authenticated attacker to execute arbitrary commands on the shell and gain root access to the system.This issue has been fixed in firmware version 1.1.0.651412
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-16 16:01 UTC
CWE
- CWE-78 - Improper neutralization of special elements used in an OS command ('OS command injection')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://cert.pl/posts/2026/09/CVE-2026-40854 | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| WNC | T-Mobile 5G Box IDU |
Affected:
0 , < 1.1.0.651412
(custom)
cpe:2.3:a:wnc:t-mobile_5g_box_idu:*:*:*:*:*:*:*:* |
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.