MSRC-CVE-2026-40411 — Azure Virtual Network Gateway Remote Code Execution Vulnerability

Summary

Impact: Remote Code Execution. Microsoft rating: Critical. Not known to be exploited. Customer action: Not required.

Details

Why are there no links to an update or instructions with steps that must be taken to protect from this vulnerability?
This vulnerability has already been fully mitigated by Microsoft. There is no action for users of this service to take. The purpose of this CVE is to provide further transparency.
Please see Toward greater transparency: Unveiling Cloud Service CVEs for more information.

Vulnerabilities 1

Critical 9.9

CVE-2026-40411

Azure Virtual Network Gateway Remote Code Execution Vulnerability

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

Microsoft Azure Virtual Network Gateway

May 22, 2026

Revision history

2026-05-21 #1
Information published.

References

CVE-2026-40411 Azure Virtual Network Gateway Remote Code Execution Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40411
Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
Common Vulnerability Scoring System
https://www.first.org/cvss