CVE-2021-26443 Microsoft Virtual Machine Bus (VMBus) Remote Code Execution Vulnerability
An attacker can execute arbitrary code on Windows systems via the Virtual Machine Bus, requiring immediate patching.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-26443?
CVE-2021-26443 is a critical code injection vulnerability in Microsoft Windows 10, published on 10 Nov 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Microsoft Virtual Machine Bus (VMBus) Remote Code Execution Vulnerability
Which versions are affected by CVE-2021-26443?
It affects 5 products.
Products include Microsoft Windows 10, Microsoft Windows 11, Microsoft Windows Server 2016, Microsoft Windows Server 2019, Microsoft Windows Server 2022.
How do I fix CVE-2021-26443?
No fix has been published for CVE-2021-26443 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-2021-26443 being exploited?
There is no known exploitation of CVE-2021-26443 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Windows 10
- CVE-2015-2426 Microsoft Windows Adobe Type Manager Library Remote Code Execution
- CVE-2015-1769 Microsoft Windows Mount Manager Privilege Escalation
- CVE-2020-1467 Windows Hard Link Elevation of Privilege Vulnerability
- CVE-2021-26424 Windows TCP/IP Remote Code Execution Vulnerability
- CVE-2021-28476 Windows Hyper-V Remote Code Execution Vulnerability
Sources
Also known as GHSA-v594-fc8g-fg3j.