CVE-2026-2081
Published: 07 February 2026
Summary
CVE-2026-2081 is a medium-severity Command Injection (CWE-77) vulnerability in Dlink Dir-823X Firmware. Its CVSS base score is 5.1 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 43.0% 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-6 (Least Privilege).
Deeper analysis
CVE-2026-2081 is an OS command injection vulnerability (CWE-77, CWE-78) affecting the D-Link DIR-823X router on firmware version 250416. The flaw exists in an unknown function of the web interface file /goform/set_password, where manipulation of the http_passwd argument enables arbitrary command execution.
The vulnerability carries a CVSS v3.1 base score of 4.7 (AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L), indicating network-accessible exploitation with low complexity but requiring high privileges, such as those of an authenticated administrator. Remote attackers meeting these prerequisites can achieve limited impacts on confidentiality, integrity, and availability through injected OS commands, without needing user interaction.
Advisories referenced in GitHub issues at master-abc/cve (issues/22 and #3847400767) and VulDB entries (ctiid.344648, id.344648, submit.745553) confirm the remote exploitability, with the proof-of-concept publicly disclosed and available for use. No specific patches or mitigation steps are detailed in the provided descriptions.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-5732
Vulnerability details
A vulnerability was determined in D-Link DIR-823X 250416. The affected element is an unknown function of the file /goform/set_password. This manipulation of the argument http_passwd causes os command injection. The attack is possible to be carried out remotely. The exploit…
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has been publicly disclosed and may be utilized.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
OS command injection in public web interface directly enables T1190 exploitation for RCE; resulting arbitrary Unix shell commands map to T1059.004.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly requires validation and sanitization of the http_passwd input argument to block OS command injection in /goform/set_password.
Restricts the number of accounts permitted to reach the set_password function, limiting the population that can exploit the injection.
Mandates timely application of vendor patches or workarounds once the command-injection flaw is publicly disclosed.