CVE-2023-21689 Microsoft Protected Extensible Authentication Protocol (PEAP) Remote Code Execution Vulnerability
An attacker can execute arbitrary code on Windows systems via a vulnerability in the Protected Extensible Authentication Protocol implementation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-21689?
CVE-2023-21689 is a critical memory corruption vulnerability in Microsoft Windows 10 1507, published on 14 Feb 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Microsoft Protected Extensible Authentication Protocol (PEAP) Remote Code Execution Vulnerability
Weakness: CWE-122
Which versions are affected by CVE-2023-21689?
It affects 13 products.
Products include Microsoft Windows 10 1507, Microsoft Windows 10 1607, Microsoft Windows 10 1809, Microsoft Windows 10 20h2, Microsoft Windows 10 21h2, Microsoft Windows 10 22h2 and 7 more.
How do I fix CVE-2023-21689?
No fix has been published for CVE-2023-21689 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-2023-21689 being exploited?
There is no known exploitation of CVE-2023-21689 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Windows 10 1507
- CVE-2017-8543 Microsoft Windows Search Remote Code Execution
- CVE-2025-33053 Microsoft Windows External Control of File Name or Path
- CVE-2025-33073 Microsoft Windows SMB Client Improper Access Control
- CVE-2024-49039 Microsoft Windows Task Scheduler Privilege Escalation
- CVE-2024-43461 Microsoft Windows MSHTML Platform Spoofing
Sources
Also known as GHSA-76p3-c44w-mmmj.