CVE-2026-2142
Published: 08 February 2026
Summary
CVE-2026-2142 is a high-severity Command Injection (CWE-77) vulnerability in Dlink Dir-823X Firmware. Its CVSS base score is 7.2 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 29.7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Threat & Defense at a Glance
Threat & Defense Details
Likely Mitigating ControlsAI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
OS command injection in public-facing router web form (/goform/set_qos) directly enables T1190 exploitation and arbitrary Unix shell command execution (T1059.004).
NVD Description
A weakness has been identified in D-Link DIR-823X 250416. This vulnerability affects the function sub_420688 of the file /goform/set_qos. Executing a manipulation can lead to os command injection. The attack can be executed remotely. The exploit has been made available…
more
to the public and could be used for attacks.
Deeper analysisAI
CVE-2026-2142 is an OS command injection vulnerability (CWE-77, CWE-78) affecting the D-Link DIR-823X router on firmware version 250416. The weakness is located in the sub_420688 function of the /goform/set_qos file, where manipulations enable command injection.
The vulnerability is remotely exploitable over the network with low attack complexity and no user interaction required, but it demands high privileges from the attacker. Successful exploitation grants high impacts across confidentiality, integrity, and availability, as reflected in its CVSS v3.1 base score of 7.2 (AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H), potentially allowing full system compromise.
VulDB advisories document the issue and note that a public exploit is available, increasing the risk of attacks. References point to a GitHub issue and the D-Link website for additional details on potential mitigations or patches.
Details
- CWE(s)