Dir 823x Firmware
CVE-2026-2120
HIGH
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessAccess D-Link DIR-823X web interface
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ExploitPOST crafted request to /goform/set_server_settings
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ExecutionInject OS commands in terminal_addr/server_ip/server_port parameters
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ImpactExecute arbitrary commands as root
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; attacker requires high-privilege administrative credentials to access /goform/set_server_settings endpoint; vulnerable configuration parameter handler must be enabled for remote OS command injection exploitation. |
| 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. |
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Alert meAnalysisAIv1 – Mar 12, 2026
Remote code execution in D-Link DIR-823X routers through OS command injection in the /goform/set_server_settings endpoint allows unauthenticated attackers to execute arbitrary commands by manipulating terminal_addr, server_ip, or server_port parameters. Public exploit code exists for this vulnerability, and no patch is currently available, leaving affected devices at high risk.
Earlier versions of this analysis (1)
A vulnerability was identified in D-Link DIR-823X 250416. This affects an unknown function of the file /goform/set_server_settings of the component Configuration Parameter 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 vulnerability was identified in D-Link DIR-823X 250416. This affects an unknown function of the file /goform/set_server_settings of the component Configuration Parameter Handler. The manipulation of the argument terminal_addr/server_ip/server_port leads to os command injection. The attack may be initiated remotely. The exploit is publicly available and might be used.
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- Exploit and PoC references, threat intelligence from 22 sources
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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 vulnerability was identified in D-Link DIR-823X 250416. This affects an unknown function of the file /goform/set_server_settings of the component Configuration Parameter Handler. The manipulation of the argument terminal_addr/server_ip/server_port leads to os command injection. The attack may be initiated remotely. The exploit is publicly available and might be used.
Executive ViewAI
A high-severity vulnerability (CVE-2026-2120) affects D-Link DIR-823X routers, enabling attackers to manipulate critical configuration settings through an unauthenticated web interface. Organizations using this device model face immediate risk of network compromise, data interception, and unauthorized access, with public exploits already available and no vendor patch currently available.
Disable access to /goform/set_server_settings endpoint via WAF or firewall rules; restrict HTTP/HTTPS administrative access to trusted IP ranges only; disable remote management and WAN-based configuration access; implement network segmentation to isolate router from critical assets; enable detailed logging and alerting on configuration parameter changes; consider temporary replacement of affected devices with patched alternatives pending vendor update.
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
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