CVE-2026-1544
Published: 28 January 2026
Summary
CVE-2026-1544 is a medium-severity Command Injection (CWE-77) vulnerability in Dlink Dir-823X Firmware. Its CVSS base score is 5.3 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 14.2% 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 SA-22 (Unsupported System Components) and SI-10 (Information Input Validation).
Deeper analysis
CVE-2026-1544 is an OS command injection vulnerability (CWE-77, CWE-78) in the D-Link DIR-823X router running firmware version 250416. The flaw affects the sub_41E2A0 function in the /goform/set_mode file, where manipulation of the lan_gateway argument enables arbitrary OS command execution. Published on 2026-01-28, it carries a CVSS 3.1 base score of 6.3 (AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L).
The vulnerability is exploitable remotely by attackers possessing low privileges, requiring no user interaction. Successful exploitation grants limited access to execute OS commands, potentially compromising confidentiality, integrity, and availability to a low degree. A public exploit has been released, increasing the risk of attacks against vulnerable devices.
This issue impacts only products no longer supported by the maintainer, with no patches available. Advisories from VulDB detail the vulnerability and submission, a GitHub issue provides further analysis, and the D-Link website is referenced, though no specific mitigation steps are outlined beyond device replacement or network isolation.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-4854
Vulnerability details
A security flaw has been discovered in D-Link DIR-823X 250416. Impacted is the function sub_41E2A0 of the file /goform/set_mode. Performing a manipulation of the argument lan_gateway results in os command injection. The attack is possible to be carried out remotely.…
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The exploit has been released to the public and may be used for attacks. This vulnerability only affects products that are no longer supported by the maintainer.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
OS command injection in public-facing router web interface (/goform/set_mode) directly enables remote exploitation of the device (T1190) and arbitrary command execution (T1059).
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Mandatory validation and sanitization of the lan_gateway argument in /goform/set_mode would block the OS command injection payload before execution.
Directly requires replacement or isolation of the unsupported DIR-823X firmware that receives no patches for this flaw.
Boundary-protection rules can restrict remote access to the router's management interface, reducing the attack surface for the injection vector.