CVE-2023-21551 Microsoft Cryptographic Services Elevation of Privilege Vulnerability
An attacker can exploit a use-after-free flaw in Microsoft Cryptographic Services to elevate privileges on affected Windows systems.
- 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-2023-21551?
CVE-2023-21551 is a high-severity vulnerability in Microsoft Windows 10 1809, published on 10 Jan 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Microsoft Cryptographic Services Elevation of Privilege Vulnerability
Which versions are affected by CVE-2023-21551?
It affects 8 products.
Products include Microsoft Windows 10 1809, Microsoft Windows 10 20h2, Microsoft Windows 10 21h2, Microsoft Windows 10 22h2, Microsoft Windows 11 21h2, Microsoft Windows 11 22h2 and 2 more.
How do I fix CVE-2023-21551?
No fix has been published for CVE-2023-21551 yet. Limit exposure of the affected software until one is available.
Is CVE-2023-21551 being exploited?
There is no known exploitation of CVE-2023-21551 in the wild and no public exploit code.
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-4mwf-jv6c-g6rm.