EUVD-2026-64980
GHSA-c34j-h938-5r57
Severity by source
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
Pre-auth (PR:N), network-reachable (AV:N), low-complexity (AC:L) command injection yielding root gives full C/I/A:H; scope unchanged as impact stays on the device OS.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
3DescriptionCVE.org
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.
AnalysisAI
Pre-authentication OS command injection in DrayTek VigorSwitch managed switches lets a remote, unauthenticated attacker run arbitrary commands as root by supplying crafted input to the setget.cgi 'pass' field, which is passed to a shell without sufficient filtering. The flaw affects a broad range of VigorSwitch models (G/P/Q-series including G2540Xs, P2282X, Q2300X, G2542X and ~30 listed variants) and carries a CVSS 4.0 score of 9.3. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires network reachability to the switch's web management interface exposing setget.cgi; per the CVSS vector (AV:N/AC:L/PR:N/UI:N) no authentication, user interaction, or non-default configuration is needed, so any affected VigorSwitch model whose management HTTP(S) service is reachable by the attacker is exploitable against default configurations. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuine high-priority issue rather than an inflated CVSS score. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Patch available per vendor advisory: DrayTek published a VigorSwitch series security advisory (August 2026) addressing this issue - apply the fixed firmware for your exact model as listed at https://www.draytek.com/about/security-advisory/multiple-vulnerabilities-in-vigorswitch-series-august-2026/ (exact fixed version not stated in the available data, so verify the per-model build on the vendor page before deploying). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct a complete inventory of all DrayTek VigorSwitch deployments and immediately isolate any G/P/Q-series models from untrusted or external-facing network segments; restrict access to management interfaces to named administrator accounts only. …
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Same weakness CWE-78 – OS Command Injection
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External POC / Exploit Code
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