CVE-2026-38834
Published: 21 April 2026
Summary
CVE-2026-38834 is a high-severity Command Injection (CWE-77) vulnerability in Tenda W30E Firmware. Its CVSS base score is 7.3 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 5.8% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).
Threat & Defense at a Glance
Threat & Defense Details
Mitigating Controls (NIST 800-53 r5)AI
Directly mitigates command injection by requiring validation of the unsanitized hostName parameter in the do_ping_action function.
Remediates the specific command injection flaw through identification, reporting, and patching of the vulnerable firmware version V16.01.0.21.
Requires identification and authentication for non-organizational users accessing the vulnerable do_ping_action function, blocking unauthenticated remote exploitation.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Command injection in public-facing router interface (do_ping_action) enables remote unauthenticated arbitrary command execution, directly mapping to T1190 (Exploit Public-Facing Application) and T1059.004 (Unix Shell) for command execution on Linux-based firmware.
NVD Description
Tenda W30E V2.0 V16.01.0.21 was found to contain a command injection vulnerability in the do_ping_action function via the hostName parameter. This vulnerability allows attackers to execute arbitrary commands via a crafted request.
Deeper analysisAI
CVE-2026-38834, published on 2026-04-21, is a command injection vulnerability in the Tenda W30E V2.0 router running firmware version V16.01.0.21. The issue exists in the do_ping_action function, where the hostName parameter lacks proper input sanitization, enabling attackers to inject and execute arbitrary commands via a crafted request. It is classified under CWE-77 with a CVSS v3.1 base score of 7.3 (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L).
Remote unauthenticated attackers can exploit this vulnerability over the network with low attack complexity and no user interaction required. By sending a specially crafted request to the affected function, attackers achieve arbitrary command execution on the device, resulting in low impacts to confidentiality, integrity, and availability.
Advisories and further details are available in the referenced GitHub repository at https://github.com/jsjbcyber/repo/blob/main/rep_1.md.
Details
- CWE(s)