CVE-2023-21695
Published: 14 February 2023
Summary
CVE-2023-21695 is a high-severity Heap-based Buffer Overflow (CWE-122) vulnerability in Microsoft Windows Server 2008. Its CVSS base score is 7.5 (High).
Operationally, ranked in the top 10.3% 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-2023-21695. The flaw, assigned CWE-122, affects the PEAP implementation in Microsoft Windows and carries a CVSS 3.1 score of 7.5 reflecting network attack vector, high attack complexity, low privileges required, and no user interaction.
An authenticated attacker positioned on the network can exploit the issue to execute arbitrary code with high impact to confidentiality, integrity, and availability. The attack requires specific conditions consistent with the high complexity rating but does not need user interaction once network access is obtained.
Microsoft’s security advisory at msrc.microsoft.com details the vulnerability and supplies the corresponding security update that addresses the flaw in affected Windows releases.
EPSS for the CVE rose from low values to a peak of 0.1481 on 2025-01-22 before receding to the current 0.0478, indicating a period of increased exploitation interest after disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-25862
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.