Home/CVE/A security flaw has been discovered in D-Link DIR-823X 250416. The affected element is the function sub_4208A0 of the fi
CVE

CVE-2026-2155

A security flaw has been discovered in D-Link DIR-823X 250416. The affected element is the function sub_4208A0 of the fi

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.

HIGH · CVSS 7.2 EPSS 0.00555
Act now
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
▤

Affected Products & Versions

1
dlink dir-823x firmwareall versions
⚠

Public Exploits & PoCs

1
pocgithub.com · issues/32github.com
▣

Scoring & Timeline

7.2
HIGH · CVSS v3.1 · cna@vuldb.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD08 Feb 2026 · 02:16 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
poc
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

5
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://vuldb.com/?ctiid.344857Permissions RequiredVDB Entry
https://vuldb.com/?id.344857Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.748236Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.750038Third Party AdvisoryVDB Entry
https://www.dlink.com/Product
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