CVE-2023-21727 Remote Procedure Call Runtime Remote Code Execution Vulnerability
An attacker can execute arbitrary code on affected Windows systems by exploiting a heap-based buffer overflow in the RPC Runtime.
- 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-2023-21727?
CVE-2023-21727 is a high-severity memory corruption vulnerability in Microsoft Windows 10 1607, published on 11 Apr 2023. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Remote Procedure Call Runtime Remote Code Execution Vulnerability
Weakness: CWE-122
Which versions are affected by CVE-2023-21727?
It affects 12 products.
Products include Microsoft Windows 10 1607, Microsoft Windows 10 1809, Microsoft Windows 10 20h2, Microsoft Windows 10 21h2, Microsoft Windows 10 22h2, Microsoft Windows 11 21h2 and 6 more.
How do I fix CVE-2023-21727?
No fix has been published for CVE-2023-21727 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2023-21727 being exploited?
There is no known exploitation of CVE-2023-21727 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Windows 10 1607
- CVE-2026-33824 Microsoft Internet Key Exchange (IKE) Service Extensions Double Free
- CVE-2026-21510 Microsoft Windows Shell Protection Mechanism Failure
- CVE-2026-21513 Microsoft MSHTML Framework Protection Mechanism Failure
- CVE-2023-32049 Microsoft Windows Defender SmartScreen Security Feature Bypass
- CVE-2023-29360 Microsoft Streaming Service Untrusted Pointer Dereference
Sources
Also known as GHSA-h785-wmf4-9p56.