Dir 823x Firmware
CVE-2026-2155
HIGH
Severity by source
AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
3DescriptionCVE.org
A security flaw has been discovered in D-Link DIR-823X 250416. The affected element is the function sub_4208A0 of the file /goform/set_dmz of the component Configuration Handler. The manipulation of the argument dmz_host/dmz_enable results in os command injection. The attack can be executed remotely. The exploit has been released to the public and may be used for attacks.
AnalysisAI
Remote code execution in D-Link DIR-823X routers through OS command injection in the DMZ configuration handler allows unauthenticated attackers to execute arbitrary commands on affected devices. The vulnerability exists in the /goform/set_dmz endpoint where the dmz_host and dmz_enable parameters are insufficiently sanitized, and public exploit code is currently available. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | D-Link DIR-823X firmware 250416 with /goform/set_dmz endpoint exposed; attacker requires valid high-privilege administrator credentials to access configuration handler; default or weak administrative credentials increase practical exploitability. Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 7.2 (HIGH). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | A remote attacker could exploit this flaw, os command injection. |
| Remediation | Monitor vendor advisories for a patch. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Inventory all D-Link DIR-823X 250416 devices in your network and isolate affected units from production environments if possible. …
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External POC / Exploit Code
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