Critical severity9.8NVD Advisory· Published Aug 24, 2026

CVE-2026-71921

Description

Multiple DrayTek VigorSwitch models contain a pre-authentication command injection vulnerability in the setget.cgi interface. The vulnerability is caused by insufficient filtering of the pass field before command execution. A remote attacker can trigger this vulnerability via crafted input to execute arbitrary commands with root privileges.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Draytek/VigorSwitchllm-fuzzy

Patches

Vulnerability mechanics

References

www.draytek.com/about/security-advisory/multiple-vulnerabilities-in-vigorswitch-series-august-2026/nvd
www.vulncheck.com/advisories/draytek-vigorswitch-multiple-models-pre-authentication-os-command-injection-via-setget-cginvd

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