CVE-2026-40411: CWE-20: Improper Input Validation in Microsoft Azure Virtual Network Gateway
Improper input validation in Azure Virtual Network Gateway allows an authorized attacker to execute code over a network.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-40411) in Azure Virtual Network Gateway stems from improper input validation (CWE-20). An authorized attacker can exploit this flaw to execute arbitrary code remotely over the network. The vulnerability affects the cloud-hosted Azure Virtual Network Gateway service. Microsoft has published an official fix and manages remediation on their cloud platform. No known exploits are reported in the wild at this time.
Potential Impact
Successful exploitation can lead to remote code execution with high impact on confidentiality, integrity, and availability of the affected Azure Virtual Network Gateway service. This could allow attackers to compromise the network gateway, potentially affecting connected virtual networks and resources.
Mitigation Recommendations
Microsoft has released an official fix for this vulnerability and manages remediation for the Azure Virtual Network Gateway cloud service. Users should ensure their Azure environment is updated according to Microsoft's guidance at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40411. No additional user action is required beyond applying the official fix.
CVE-2026-40411: CWE-20: Improper Input Validation in Microsoft Azure Virtual Network Gateway
Description
Improper input validation in Azure Virtual Network Gateway allows an authorized attacker to execute code over a network.
CVSS v3.1
Score 9.9critical
Affected software
Microsoft
Azure Virtual Network Gateway
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-40411) in Azure Virtual Network Gateway stems from improper input validation (CWE-20). An authorized attacker can exploit this flaw to execute arbitrary code remotely over the network. The vulnerability affects the cloud-hosted Azure Virtual Network Gateway service. Microsoft has published an official fix and manages remediation on their cloud platform. No known exploits are reported in the wild at this time.
Potential Impact
Successful exploitation can lead to remote code execution with high impact on confidentiality, integrity, and availability of the affected Azure Virtual Network Gateway service. This could allow attackers to compromise the network gateway, potentially affecting connected virtual networks and resources.
Mitigation Recommendations
Microsoft has released an official fix for this vulnerability and manages remediation for the Azure Virtual Network Gateway cloud service. Users should ensure their Azure environment is updated according to Microsoft's guidance at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40411. No additional user action is required beyond applying the official fix.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-04-13T00:27:50.798Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Is Cloud Service
- true
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40411","vendor":"Microsoft"}]
Threat ID: 6a10d8e4e1370fbb485de034
Added to database: 05/22/2026, 22:29:56 UTC
Last enriched: 08/11/2026, 16:48:49 UTC
Last updated: 09/13/2026, 22:01:33 UTC
Views: 141
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