Critical 9.1Published Aug 24, 2026

CVE-2026-71933DrayTek VigorSwitch Multiple Models Missing Authorization in Syslog Functions

Updated under an hour ago (Oct 27, 2026, 6:40 PM ET)

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

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Every CVE for DrayTek Corporation VigorSwitch G2540xs

Exploited in the last 30 days

Multiple DrayTek VigorSwitch models contain unauthorized operation vulnerabilities in multiple syslog functions. The vulnerability is caused by missing authorization checks. A remote attacker can trigger these vulnerabilities via crafted requests to modify configuration, restart services, save startup configuration, or clear logs.

CVSS: 9.1 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Weakness (CWE): CWE-862
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 26, 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-missing-authorization-in-syslog-functions	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.