CVE-2026-71918

Multiple DrayTek VigorSwitch models contain a command injection vulnerability in the webBackupAction function. The vulnerability is caused by insufficient filtering of the option, key, pw_encode, pathN, and valueN 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.

CVSS v3 7.2 HIGH

7.2^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://www.draytek.com/about/security-advisory/multiple-vulnerabilities-in-vigorswitch-series-august-2026/
https://www.vulncheck.com/advisories/draytek-vigorswitch-multiple-models-os-command-injection-via-webbackupaction

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-24 18:17

Updated : 2026-08-26 17:17

NVD link : CVE-2026-71918

Mitre link : CVE-2026-71918

CVE.ORG link : CVE-2026-71918

JSON object : View

Products Affected

No product.

CWE

CWE-78

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

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The vulnerability is caused by insufficient filtering of the option, key, pw_encode, pathN, and valueN 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."}], "lastModified": "2026-08-26T17:17:12.543", "sourceIdentifier": "disclosure@vulncheck.com"}