Dir 823x Firmware
CVE-2026-2155
HIGH
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
-
AccessAccess D-Link DIR-823X web interface
-
DeliveryAuthenticate as high-privilege administrator
-
ExploitCraft malicious payload in dmz_host parameter
-
ExecutionSubmit request to /goform/set_dmz endpoint
-
ImpactOS command injection executes arbitrary commands
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Command injection prevention
MITRE ATT&CK
1 technique across 1 tactic: Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Exploitation Conditions | 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. |
| Impact | CVSS 7.2 (HIGH). Attack vector: Network. Complexity: Low. Privileges required: High. User interaction: None. Exploitable via remote/network. Public exploit/POC available. |
| Exploit ScenarioDerived | A remote attacker could exploit this flaw, os command injection. |
Get an e-mail when this CVE is exploited, patched or re-scored. Free account.
Alert meAnalysisAIv1 – Mar 12, 2026
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. Organizations using DIR-823X firmware should prioritize patching as no official fix is currently available.
Earlier versions of this analysis (1)
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. [CVSS 7.2 HIGH]
RemediationAI
Monitor vendor advisories for a patch. Restrict network access to the affected service where possible.
Affects your stack
Find out whether the stacks and servers you run are on an affected version.
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
Classified as CWE-77 (Command Injection). Affects Dir-823X Firmware. 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.
Know when Dir 823x Firmware gets its next vulnerability
- Watch products and get an email when something new is published
- Check this CVE against your own stack and servers
- Exploit and PoC references, threat intelligence from 22 sources
No credit card · 7-day full trial
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
Lifecycle Timeline
2DescriptionCVE.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.
Executive ViewAI
A high-severity vulnerability in D-Link DIR-823X routers allows unauthenticated attackers to manipulate DMZ configurations, potentially exposing internal network resources to external threats. Organizations using affected D-Link devices face immediate risk of network compromise, as public exploits are available and no vendor patch has been released.
Disable DMZ feature and close access to /goform/set_dmz endpoint via firewall rules. Restrict administrative access to affected routers using network segmentation and IP whitelisting. Deploy WAF rules to block requests to vulnerable URI paths. Implement enhanced network monitoring for anomalous outbound traffic from DMZ-exposed systems. If possible, replace affected D-Link devices with alternative vendors pending patch availability.
Threat Intelligence Overview
NVD
CVE.org
EPSS
GitHub
VulDB
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
OS command injection occurs when an application passes unsanitized user input directly into system shell commands.
Affected Products (CPE)CVE.org
More in Dir 823x Firmware
View allAn issue in dlink DIR 832x 240802 allows a remote attacker to execute arbitrary code via the function 0x417234. Rated cr
An issue in dlink DIR 832x 240802 allows a remote attacker to execute arbitrary code via the macaddr key value to the fu
An issue in dlink DIR 823x 240802 allows a remote attacker to execute arbitrary code via the target_addr key value and t
An issue in dlink DIR 823x 240802 allows a remote attacker to execute arbitrary code via the target_addr key value and t
D-Link DIR-823X AX3000 Dual-Band Gigabit Wireless Router v21_D240126 was discovered to contain a remote code execution (
A vulnerability, which was classified as problematic, was found in D-Link DIR-823X 240126/240802. Rated high severity (C
An issue was discovered in DIR-823 firmware 20250416. Rated high severity (CVSS 8.8), this vulnerability is no authentic
An issue in dlink DIR 832x 240802 allows a remote attacker to execute arbitrary code via the function 0x41dda8. Rated hi
Unauthenticated attackers can execute arbitrary operating system commands on D-Link DIR-823X routers through the /goform
Remote code execution in D-Link DIR-823X routers through OS command injection in the static route configuration endpoint
Remote code execution in D-Link DIR-823X routers through OS command injection in the /goform/set_server_settings endpoin
D-Link DIR-823X firmware contains a command injection vulnerability in the /goform/set_language endpoint that allows rem
Exploit-DB