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Azure Virtual Network Gateway CVE-2026-40411

| EUVD-2026-31510 CRITICAL
Improper Input Validation (CWE-20)
2026-05-22 microsoft GHSA-g63w-3vwq-rqw8
9.9
CVSS 3.1
Temporal: 8.6
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CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

1
Analysis Generated
May 22, 2026 - 22:45 vuln.today

DescriptionNVD

Improper input validation in Azure Virtual Network Gateway allows an authorized attacker to execute code over a network.

AnalysisAI

Remote code execution in Microsoft Azure Virtual Network Gateway allows an authenticated attacker with low privileges to execute arbitrary code across a network boundary due to improper input validation. The CVSS 9.9 score reflects scope-changed impact (S:C) where exploitation can compromise resources beyond the vulnerable component itself, affecting confidentiality, integrity, and availability. …

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RemediationAI

Within 24 hours: Inventory all Azure Virtual Network Gateway instances and audit access permissions for low-privilege accounts; restrict unnecessary access pending patch application. Within 7 days: Apply the available vendor patch to all affected Azure VNG deployments. …

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CVE-2026-40411 vulnerability details – vuln.today

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