Critical 9.8Published Aug 24, 2026

CVE-2026-71921DrayTek VigorSwitch Multiple Models Pre-Authentication OS Command Injection via setget.cgi

Updated under an hour ago (Oct 28, 2026, 12:23 PM ET)

Does this affect you?

It affects DrayTek Corporation VigorSwitch G2540xs and 27 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for DrayTek Corporation VigorSwitch G2540xs

Exploited in the last 30 days

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.

CVSS: 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-78
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: Aug 27, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

DrayTek Corporation VigorSwitch G2540xs draytek:vigorswitch_g2540xs (from the name)	before 3.9.10	CNA record
DrayTek Corporation VigorSwitch P2540xs draytek:vigorswitch_p2540xs (from the name)	before 3.9.10	CNA record
DrayTek Corporation VigorSwitch FX2120 draytek:vigorswitch_fx2120 (from the name)	before 3.9.10	CNA record
DrayTek Corporation VigorSwitch G2282x draytek:vigorswitch_g2282x (from the name)	before 2.10.6	CNA record
DrayTek Corporation VigorSwitch P2282x draytek:vigorswitch_p2282x (from the name)	before 2.10.6	CNA record
DrayTek Corporation VigorSwitch Q2300x draytek:vigorswitch_q2300x (from the name)	before 2.10.7	CNA record
DrayTek Corporation VigorSwitch PQ2300xb draytek:vigorswitch_pq2300xb (from the name)	before 2.10.7	CNA record
DrayTek Corporation VigorSwitch G2542x draytek:vigorswitch_g2542x (from the name)	before 3.10.6	CNA record
DrayTek Corporation VigorSwitch P2542x draytek:vigorswitch_p2542x (from the name)	before 3.10.6	CNA record
DrayTek Corporation VigorSwitch P2542xh draytek:vigorswitch_p2542xh (from the name)	before 3.10.6	CNA record
1–10 of 28

References

References

https://www.draytek.com/about/security-advisory/multiple-vulnerabilities-in-vigorswitch-series-august-2026/	vendor-advisory
https://www.vulncheck.com/advisories/draytek-vigorswitch-multiple-models-pre-authentication-os-command-injection-via-setget-cgi	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.