CVE-2026-71921
CVE-2026-71921
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.
Vulnerability class: Command Injection (OS Command Injection)
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Weakness classification (CWE)
References
- disclosure@vulncheck.com (vendor-advisory)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-71921?
- CVE-2026-71921 is a critical-severity vulnerability, classified under OS Command Injection. CVSS score: 9.8/10. Published 2026-08-24.
- How severe is CVE-2026-71921?
- Critical severity. CVSS v3 base score is 9.8 out of 10.