CVE-2026-2168
Published: 08 February 2026
Summary
CVE-2026-2168 is a medium-severity Injection (CWE-74) vulnerability in Dlink Dwr-M921 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 14.6% 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 AC-3 (Access Enforcement).
Deeper analysis
CVE-2026-2168 is a command injection vulnerability (CWE-74, CWE-77) affecting the D-Link DWR-M921 router on firmware version 1.1.50. The issue lies in the function sub_419920 within the file /boafrm/formLtefotaUpgradeQuectel, where manipulation of the fota_url argument enables attackers to inject and execute arbitrary commands. Published on 2026-02-08, it carries a CVSS v3.1 base score of 6.3 (AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L).
The vulnerability is remotely exploitable over the network with low attack complexity and no user interaction required, but it necessitates low privileges such as an authenticated account. Attackers can achieve limited impacts, including partial disclosure of sensitive information, minor data modification, and partial denial of service. An exploit has been publicly released, facilitating potential widespread abuse.
Mitigation guidance and further details are available in advisories at https://vuldb.com/?ctiid.344870, https://vuldb.com/?id.344870, https://vuldb.com/?submit.748838, the GitHub issue https://github.com/LX-66-LX/cve-new/issues/2, and the D-Link website https://www.dlink.com/.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-5781
Vulnerability details
A flaw has been found in D-Link DWR-M921 1.1.50. This affects the function sub_419920 of the file /boafrm/formLtefotaUpgradeQuectel. This manipulation of the argument fota_url causes command injection. It is possible to initiate the attack remotely. The exploit has been published…
more
and may be used.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Command injection in exposed router web form directly enables remote exploitation of public-facing application (T1190) and arbitrary Unix shell command execution (T1059.004).
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly requires validation and sanitization of the fota_url argument before it reaches sub_419920, blocking command injection at the root cause.
Enforces that only properly mediated and authorized inputs are accepted by the formLtefotaUpgradeQuectel handler, limiting what an authenticated session can execute.
Restricts enabling or exposing the vulnerable FOTA upgrade function unless explicitly required, reducing the attack surface of the web management interface.