CVE-2026-40411 Azure Virtual Network Gateway Remote Code Execution Vulnerability
An authorized attacker can execute arbitrary code on Azure Virtual Network Gateway due to improper input validation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-40411?
CVE-2026-40411 is a critical code injection vulnerability in Microsoft Azure Virtual Network Gateway, published on 22 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Improper input validation in Azure Virtual Network Gateway allows an authorized attacker to execute code over a network.
Weakness: CWE-20
Which versions are affected by CVE-2026-40411?
It affects 1 product.
Products include Microsoft Azure Virtual Network Gateway.
How do I fix CVE-2026-40411?
No fix has been published for CVE-2026-40411 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-40411 being exploited?
There is no known exploitation of CVE-2026-40411 in the wild and no public exploit code.
Sources
Also known as GHSA-g63w-3vwq-rqw8.