CVE-2023-21692
Published: 14 February 2023
Summary
CVE-2023-21692 is a critical-severity Heap-based Buffer Overflow (CWE-122) vulnerability in Microsoft Windows 10 1809. Its CVSS base score is 9.8 (Critical).
Operationally, ranked in the top 4.9% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
Microsoft Protected Extensible Authentication Protocol (PEAP) contains a remote code execution vulnerability tracked as CVE-2023-21692. The flaw affects the PEAP implementation in Microsoft Windows and carries a CVSS 3.1 score of 9.8, reflecting network-accessible attack conditions with no required privileges or user interaction and full impact on confidentiality, integrity, and availability. Associated weakness identifiers include CWE-122.
An unauthenticated attacker able to reach a vulnerable PEAP endpoint over the network can trigger the flaw to execute arbitrary code with the privileges of the affected process. Successful exploitation therefore grants complete control over the target system without any prior authentication or user assistance.
Microsoft security advisories hosted at the MSRC update guide for CVE-2023-21692 describe available patches and recommend applying the updates released for supported Windows versions to eliminate the vulnerability.
EPSS probability for the CVE rose from lower values after disclosure to a recorded peak of 0.3048 on 2025-12-11 before receding to the current level of 0.1667, indicating a later surge in observed exploitation interest.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-25859
Vulnerability details
Microsoft Protected Extensible Authentication Protocol (PEAP) Remote Code Execution Vulnerability
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.