CVE-2026-71924
Received Received - Intake

Command Injection in DrayTek VigorSwitch

Publication date: 2026-08-24

Last updated on: 2026-08-24

Assigner: VulnCheck

Description
Multiple DrayTek VigorSwitch models contain a command injection vulnerability in the getVid function. The vulnerability is caused by insufficient filtering of the username and password fields before command execution. A remote attacker can trigger this vulnerability via crafted input to execute arbitrary commands with root privileges. Exploitation requires valid administrative credentials for the device's web management interface.

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Meta Information

Published
2026-08-24
Last Modified
2026-08-24
Generated
2026-08-24
AI Q&A
2026-08-24
EPSS Evaluated
N/A
NVD
CVE-2026-71924
EUVD
EUVD-2026-64983

Affected Vendors & Products

Showing 7 associated CPEs
Vendor Product Version / Range
draytek vigorswitch *
draytek vigorswitch G2540xs
draytek vigorswitch P2540xs
draytek vigorswitch FX2120
draytek vigorswitch G2282x
draytek vigorswitch P2282x
draytek vigorswitch Q2300x

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-78 The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

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Executive Summary

This is an OS command injection vulnerability in multiple DrayTek VigorSwitch models. It occurs in the getVid function due to insufficient filtering of username and password fields. A remote attacker with administrative credentials can exploit this by sending crafted input to execute arbitrary commands with root privileges.

Detection Guidance

To detect this vulnerability, check if your DrayTek VigorSwitch device is running a vulnerable firmware version. Log in to the web management interface and inspect the firmware version in the system information section. Compare it against DrayTek's security advisory for affected models and versions.

Impact Analysis

If exploited, an attacker could gain full control over the affected device, allowing them to execute malicious commands, steal data, or disrupt network operations. Since the commands run with root privileges, the impact is severe and could compromise the entire network.

Compliance Impact

This vulnerability could lead to unauthorized access and data breaches, violating compliance requirements such as GDPR (data protection) and HIPAA (health information security). Organizations may face legal penalties, reputational damage, and loss of trust due to non-compliance.

Mitigation Strategies

Immediately update the firmware of all affected DrayTek VigorSwitch devices to the latest non-vulnerable version provided by DrayTek. Ensure administrative credentials are strong and not shared. Disable remote management if not required and monitor network traffic for suspicious activity.

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