CVE-2023-21690
Published: 14 February 2023
Summary
CVE-2023-21690 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 3.5% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
Microsoft Protected Extensible Authentication Protocol (PEAP) is affected by a remote code execution vulnerability identified as CVE-2023-21690. The flaw carries a CVSS v3.1 score of 9.8 and is associated with CWE-122, enabling unauthenticated network-based attacks against the PEAP component in Microsoft implementations.
An attacker with network access can exploit the vulnerability without credentials or user interaction, achieving arbitrary code execution that fully compromises confidentiality, integrity, and availability on the target system.
The Microsoft Security Response Center advisory published at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21690 details available patches and mitigation guidance for affected products.
The CVE maintains an EPSS score of 0.2752 at both its current and peak values, indicating steady exploitation probability since disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-25857
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.