CVE-2025-21340 Windows Virtualization-Based Security (VBS) Security Feature Bypass Vulnerability
Attackers can bypass Windows Virtualization-Based Security protections, undermining system integrity and isolation mechanisms.
- 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-2025-21340?
CVE-2025-21340 is a medium-severity vulnerability in Microsoft Windows 10 1809, published on 14 Jan 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Windows Virtualization-Based Security (VBS) Security Feature Bypass Vulnerability
Weakness: CWE-284
Which versions are affected by CVE-2025-21340?
It affects 10 products.
Products include Microsoft Windows 10 1809, Microsoft Windows 10 21h2, Microsoft Windows 10 22h2, Microsoft Windows 11 22h2, Microsoft Windows 11 23h2, Microsoft Windows 11 24h2 and 4 more.
How do I fix CVE-2025-21340?
No fix has been published for CVE-2025-21340 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-21340 being exploited?
There is no known exploitation of CVE-2025-21340 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in Microsoft Windows 10 1809
- CVE-2024-29988 Microsoft SmartScreen Prompt Security Feature Bypass
- CVE-2024-21412 Microsoft Windows Internet Shortcut Files Security Feature Bypass
- CVE-2025-62221 Microsoft Windows Use After Free
- CVE-2025-30400 Microsoft Windows DWM Core Library Use-After-Free
- CVE-2024-21338 Microsoft Windows Kernel Exposed IOCTL with Insufficient Access Control
Sources
Also known as GHSA-8g2m-ppjp-6hg7.