DrayTek VigorSwitch Command Execution getVid username/password command injection

Summaryinfo

A vulnerability marked as very critical has been reported in DrayTek VigorSwitch. This impacts the function getVid of the component Command Execution. Performing a manipulation of the argument username/password results in command injection. This vulnerability is known as CVE-2026-71924. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in DrayTek VigorSwitch (the affected version is unknown). It has been classified as very critical. This affects the function getVid of the component Command Execution. The manipulation of the argument username/password with an unknown input leads to a command injection vulnerability. CWE is classifying the issue as CWE-77. The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at draytek.com. This vulnerability is uniquely identified as CVE-2026-71924 since 08/08/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. The exploitation requires an enhanced level of successful authentication. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/24/2026). The attack technique deployed by this issue is T1202 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-64983). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Router Operating System

Vendor

• DrayTek

Name

• VigorSwitch

License

• commercial

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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