Dir 823x Firmware
CVE-2026-2143
HIGH
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
-
AccessAccess DDNS Service configuration
-
ExploitInject OS commands in ddnsType/ddnsDomainName parameter
-
ImpactExecute arbitrary commands on router
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 250416 firmware with DDNS Service enabled; attacker requires high-privilege admin account access to /goform/set_ddns endpoint |
| 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
Unauthenticated attackers can achieve remote code execution on D-Link DIR-823X routers through OS command injection in the DDNS service component via the /goform/set_ddns endpoint. The vulnerability allows manipulation of DDNS parameters (ddnsType, ddnsDomain, ddnsUserName, ddnsPwd) to execute arbitrary system commands with high privileges. Public exploit code exists and no patch is currently available.
Earlier versions of this analysis (1)
A security vulnerability has been detected in D-Link DIR-823X 250416. This issue affects some unknown processing of the file /goform/set_ddns of the component DDNS Service. [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 vulnerability has been detected in D-Link DIR-823X 250416. This issue affects some unknown processing of the file /goform/set_ddns of the component DDNS Service. The manipulation of the argument ddnsType/ddnsDomainName/ddnsUserName/ddnsPwd leads to os command injection. The attack is possible to be carried out remotely. The exploit has been disclosed publicly and may be used.
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 vulnerability has been detected in D-Link DIR-823X 250416. This issue affects some unknown processing of the file /goform/set_ddns of the component DDNS Service. The manipulation of the argument ddnsType/ddnsDomainName/ddnsUserName/ddnsPwd leads to os command injection. The attack is possible to be carried out remotely. The exploit has been disclosed publicly and may be used.
Executive ViewAI
A HIGH severity vulnerability in D-Link DIR-823X routers allows remote exploitation through the DDNS service without requiring authentication. Organizations deploying these devices face immediate risk of unauthorized access, network compromise, and potential lateral movement into corporate networks, particularly if these routers serve as edge devices or remote access points.
- Disable DDNS service if not operationally required; 2) Implement Web Application Firewall (WAF) rules to block unauthorized access to /goform/set_ddns endpoint; 3) Network segmentation: restrict DDNS service access to trusted internal networks only; 4) Enhanced monitoring and alerting on DDNS-related traffic anomalies; 5) Restrict administrative access to router management interfaces to specific IP ranges; 6) Implement rate-limiting on DDNS service endpoints to slow exploitation attempts.
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
Remote code execution in D-Link DIR-823X routers through OS command injection in the DMZ configuration handler allows un
Exploit-DB