EUVD-2026-64981
GHSA-ppwv-q25g-vjpx
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/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
Unauthenticated network-reachable crash with no confidentiality or integrity impact; unchanged scope as only the local management process is affected.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
3DescriptionCVE.org
Multiple DrayTek VigorSwitch models contain a pre-authentication null pointer dereference vulnerability in the setget.cgi interface. The vulnerability is caused by missing validation when the pass field is absent. A remote attacker can trigger this vulnerability via a crafted request to crash the service and cause a denial of service.
AnalysisAI
Denial of service in multiple DrayTek VigorSwitch managed switch models can be triggered remotely without authentication via the setget.cgi web management interface. The root cause is a null pointer dereference (CWE-476) triggered when the pass field is absent from a crafted request, crashing the CGI service. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | No special conditions are required - the vulnerability is exploitable against the default web management interface (setget.cgi) of affected VigorSwitch models by any attacker who can send an HTTP request to the device management port. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 base score of 8.7 accurately represents the exploitability profile: the attack is fully network-accessible, requires no authentication, and has no complexity barriers, making it trivial to automate or script. … 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 | Apply the firmware updates identified in the official DrayTek security advisory at https://www.draytek.com/about/security-advisory/multiple-vulnerabilities-in-vigorswitch-series-august-2026/. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Inventory all DrayTek VigorSwitch deployments across your infrastructure and identify models affected by this CVE; immediately restrict network access to the management interface by disabling remote management or implementing strict firewall rules to limit access to trusted administrative networks only. …
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Same weakness CWE-476 – NULL Pointer Dereference
View allSame technique Denial Of Service
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External POC / Exploit Code
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