Dir 823x Firmware
CVE-2026-2175
HIGH
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessAuthenticate as high-privilege user
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ExploitSend crafted request to /goform/set_upnp
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ExecutionInject OS commands via upnp_enable parameter
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ImpactExecute arbitrary commands on device
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 running firmware 250416 with UPnP configuration endpoint accessible. Requires high-privilege authenticated access (PR:H) to /goform/set_upnp endpoint. Attacker must possess valid administrative credentials to exploit the upnp_enable parameter vulnerability. |
| 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 compromise the affected system. |
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Alert meAnalysisAIv1 – Mar 12, 2026
Unauthenticated attackers can execute arbitrary operating system commands on D-Link DIR-823X routers through the /goform/set_upnp endpoint via the upnp_enable parameter. Public exploit code is available for this vulnerability, and no patch has been released. This allows complete compromise of affected devices with high impact on confidentiality, integrity, and availability.
Earlier versions of this analysis (1)
A weakness has been identified in D-Link DIR-823X 250416. This vulnerability affects the function sub_420618 of the file /goform/set_upnp. [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 vulnerability affects the function sub_420618 of the file /goform/set_upnp. This manipulation of the argument upnp_enable causes os command injection. Remote exploitation of the attack is possible. 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 vulnerability affects the function sub_420618 of the file /goform/set_upnp. This manipulation of the argument upnp_enable causes os command injection. Remote exploitation of the attack is possible. The exploit has been made available to the public and could be used for attacks.
Executive ViewAI
D-Link DIR-823X routers are vulnerable to a HIGH severity attack targeting UPnP functionality that could allow unauthorized network access or device compromise. Organizations using this router model face elevated risk of breach, especially since public exploits exist and no patch is currently available from the vendor.
Disable UPnP service entirely on affected devices; restrict administrative access to /goform/set_upnp via firewall rules; segment DIR-823X routers to isolated VLANs with minimal lateral movement; implement WAF rules to block POST requests to /goform/set_upnp; monitor for exploitation attempts; establish vendor communication protocol for emergency patch notification.
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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