Dir 823x Firmware
CVE-2026-2084
HIGH
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessSend HTTP request to /goform/set_language
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ExploitInject OS command in langSelection parameter
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ImpactExecute arbitrary system command 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 with /goform/set_language endpoint accessible. Requires administrative privileges (PR:H) to authenticate and exploit the langSelection parameter for command injection. |
| 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 vulnerability to os command injection. |
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Alert meAnalysisAIv1 – Mar 12, 2026
D-Link DIR-823X firmware contains a command injection vulnerability in the /goform/set_language endpoint that allows remote attackers with high privileges to execute arbitrary OS commands via manipulation of the langSelection parameter. Public exploit code exists for this vulnerability, and no patch is currently available. Successful exploitation grants complete system compromise with confidentiality, integrity, and availability impact.
Earlier versions of this analysis (1)
A weakness has been identified in D-Link DIR-823X 250416. This impacts an unknown function of the file /goform/set_language. [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 weakness has been identified in D-Link DIR-823X 250416. This impacts an unknown function of the file /goform/set_language. Executing a manipulation of the argument langSelection can lead to os command injection. It is possible to launch the attack remotely. The exploit has been made available to the public and could be used for attacks.
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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 weakness has been identified in D-Link DIR-823X 250416. This impacts an unknown function of the file /goform/set_language. Executing a manipulation of the argument langSelection can lead to os command injection. It is possible to launch the attack remotely. The exploit has been made available to the public and could be used for attacks.
Executive ViewAI
A high-severity vulnerability (CVE-2026-2084) affects D-Link DIR-823X routers with a public exploit available, creating immediate risk to organizations relying on these devices for network access and data protection. Without an available patch, affected devices are vulnerable to potential unauthorized access or control, necessitating urgent remediation to prevent compromise of network infrastructure and connected assets.
Disable remote management access to affected devices; implement network segmentation to isolate routers from critical assets; deploy Web Application Firewall (WAF) rules to block or monitor requests to /goform/set_language; restrict administrative access to trusted IP addresses and VPN only; monitor device logs for exploitation attempts; consider replacing vulnerable devices with patched alternatives pending vendor 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
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