DrayTek VigorAP 903 dray_apm command injection

Summaryinfo

A vulnerability, which was classified as very critical, has been found in DrayTek VigorAP 918R, VigorAP 960C, VigorAP 1060C, VigorAP 906, VigorAP 912C and VigorAP 903. Affected is an unknown function of the component dray_apm. The manipulation leads to command injection. This vulnerability is referenced as CVE-2026-71914. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in DrayTek VigorAP 918R, VigorAP 960C, VigorAP 1060C, VigorAP 906, VigorAP 912C and VigorAP 903 and classified as very critical. This issue affects an unknown functionality of the component dray_apm. The manipulation with an unknown input leads to a command injection vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Multiple DrayTek VigorAP models contain a command injection vulnerability in the dray_apm component. The vulnerability is caused by insufficient validation of UDP message content after START_SPEED_TEST before command execution. A remote attacker can trigger this vulnerability via a crafted message to execute arbitrary commands with root privileges.

The advisory is shared at draytek.com. The identification of this vulnerability is CVE-2026-71914 since 08/08/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/24/2026). MITRE ATT&CK project uses the attack technique T1202 for this issue.

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

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Router Operating System

Vendor

• DrayTek

Name

• VigorAP 903
• VigorAP 906
• VigorAP 912C
• VigorAP 918R
• VigorAP 960C
• VigorAP 1060C

License

• commercial

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CPE 2.2info

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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