CVE-2026-71921
DrayTek VigorSwitch Multiple Models Pre-Authentication OS Command Injection via setget.cgi
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
DrayTek VigorSwitch Multiple Models Pre-Authentication OS Command Injection via setget.cgi
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.
- Record
CVE-2026-71921- CVSS 4.0
- 9.3 Critical
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 - CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-78
- Updated
- 2026-11-02
EUVDEUVD-2026-64980
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.
- Record
EUVD-2026-64980- CVSS 4.0
- 9.3 Critical
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 - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-c34j-h938-5r57
Multiple DrayTek VigorSwitch models contain a pre-authentication command injection vulnerability...
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.
- Record
GHSA-c34j-h938-5r57- CVSS 4.0
- 9.3 Critical
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-78
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-71921- CVSS 4.0
- 9.3 Critical
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-78
- Updated
- 2026-11-02
Affected products
- draytek corporation vigorswitch fx2120
- draytek corporation vigorswitch g1280
- draytek corporation vigorswitch g1282
- draytek corporation vigorswitch g2100
- draytek corporation vigorswitch g2121
- draytek corporation vigorswitch g2280x
- draytek corporation vigorswitch g2282x
- draytek corporation vigorswitch g2540x
- draytek corporation vigorswitch g2540xs
- draytek corporation vigorswitch g2542x
- draytek corporation vigorswitch p1280
- draytek corporation vigorswitch p1281x
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- draytek corporation vigorswitch p1282
- draytek corporation vigorswitch p2100
- draytek corporation vigorswitch p2121
- draytek corporation vigorswitch p2280x
- draytek corporation vigorswitch p2282x
- draytek corporation vigorswitch p2540x
- draytek corporation vigorswitch p2540xs
- draytek corporation vigorswitch p2542x
- draytek corporation vigorswitch p2542xh
- draytek corporation vigorswitch pq2121x
- draytek corporation vigorswitch pq2200xb
- draytek corporation vigorswitch pq2300xb
- draytek corporation vigorswitch px2060
- draytek corporation vigorswitch q2121x
- draytek corporation vigorswitch q2200x
- draytek corporation vigorswitch q2300x
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-71921 is a critical vulnerability (CVSS 9.3) in Draytek Corporation Vigorswitch Fx2120, published August 24, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.79%, the 86th percentile. No source names a fixed version.