CVE-2026-71909
Received Received - Intake

Command Injection in DrayTek VigorAP

Publication date: 2026-08-24

Last updated on: 2026-08-24

Assigner: VulnCheck

Description
Multiple DrayTek VigorAP models contain a command injection vulnerability in the InquierTime function. The vulnerability is caused by insufficient filtering of the time field 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-2026-71909
EUVD
EUVD-2026-64968

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
draytek vigorap From 3.0.0 (inc) to 4.0.0 (exc)
draytek vigorap *
draytek vigorap From 1.0 (inc) to 2.0 (inc)

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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

CVE-2026-71909 is an OS command injection vulnerability in multiple DrayTek VigorAP models. It exists in the InquierTime function due to insufficient filtering of the time field. A remote attacker with valid administrative credentials can exploit this by sending crafted input to execute arbitrary commands with root privileges.

Detection Guidance

To detect this vulnerability, check if any of the affected DrayTek VigorAP models (VigorAP 918R, 960C, 1060C, 906, 912C, 903) are running vulnerable firmware versions. Inspect web management interface logs for suspicious time field inputs or command execution attempts. No specific commands are provided in the context.

Impact Analysis

This vulnerability allows attackers to gain full control of affected devices with root privileges. This could lead to unauthorized access, data theft, network compromise, or disruption of services. Attackers need administrative credentials but can then execute any command on the device.

Compliance Impact

This vulnerability allows remote attackers with administrative access to execute arbitrary commands with root privileges on affected DrayTek VigorAP devices. Such unauthorized access could lead to data breaches, unauthorized data modification, or system compromise, which may violate compliance requirements under GDPR (data protection) and HIPAA (healthcare data security) by exposing sensitive information or failing to maintain system integrity and access controls.

Mitigation Strategies

Immediately update affected DrayTek VigorAP devices to the latest firmware versions that patch this vulnerability. Restrict administrative access to the web management interface to trusted users only. Monitor network traffic for unusual command execution patterns.

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