CRITICAL 9.8 Microsoft

CVE-2023-21689

Microsoft Protected Extensible Authentication Protocol (PEAP) Remote Code Execution Vulnerability

Microsoft Security Update 2023-Feb: Microsoft Protected Extensible Authentication Protocol (PEAP) Remote Code Execution Vulnerability

Affected Products

Windows 10 Version 1809 for 32-bit Systems
Windows 10 Version 1809 for x64-based Systems
Windows 10 Version 1809 for ARM64-based Systems
Windows Server 2019
Windows Server 2019 (Server Core installation)
Windows Server 2022
Windows Server 2022 (Server Core installation)
Windows 10 Version 20H2 for 32-bit Systems

References

Published: 2023-02-14 · Source: Microsoft · Feed updated: 2026-08-20

This critical severity vulnerability with a CVSS score of 9.8 was published on 2023-02-14 via Microsoft. EPSS score: 26.5% (top 2% of all CVEs by exploitation probability). Affected: Windows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows 10 Version 1809 for ARM64-based Systems and 5 more.

Risk Timeline

CVE Disclosed2023-02-14 · 1283 days ago

Remediation Resources

Official Advisory

msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21689

NVD / MITRE

nvd.nist.gov/vuln/detail/CVE-2023-21689

Related Vulnerabilities

CVE	Title	Severity	CVSS
CVE-2021-26867	Windows Hyper-V Remote Code Execution Vulnerability	CRITICAL	9.9
CVE-2026-57092	Microsoft Windows VMSwitch Elevation of Privilege Vulnerability	CRITICAL	9.9
CVE-2021-26877	Windows DNS Server Remote Code Execution Vulnerability	CRITICAL	9.8
CVE-2021-26893	Windows DNS Server Remote Code Execution Vulnerability	CRITICAL	9.8
CVE-2021-26894	Windows DNS Server Remote Code Execution Vulnerability	CRITICAL	9.8
CVE-2021-26895	Windows DNS Server Remote Code Execution Vulnerability	CRITICAL	9.8

vulnfeed aggregates 11644 vulnerabilities from NVD, CISA KEV, Ubuntu, Debian, Red Hat, Kubernetes, Exploit-DB, OSS-Security, GitHub and OpenStack — updated every 4 hours.