CVE-2026-71921CWE-78command-injection

CVE-2026-71921

Critical · published August 24, 2026

CVSS v3.1
9.8
EPSS
3%
Percentile
86.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
9.3 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS
0.02787 · 86.3th percentile
Weakness
CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Published
2026-08-24T22:17Z
References (2)
https://www.draytek.com/about/security-advisory/multiple-vulnerabilities-in-vigorswitch-series-august-2026/ · [email protected]https://www.vulncheck.com/advisories/draytek-vigorswitch-multiple-models-pre-authentication-os-command-injection-via-setget-cgi · [email protected]
EPSS history
Timeline
  • 26 AUG 08:24Z
    EPSS moved — → 3%
    epss
  • 24 AUG 17:07Z
    DrayTek VigorSwitch Multiple Models Pre-Authentication OS Command Injection via setget.cgi
    cvelistv5