Raw vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.
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, exploitation aligns with the MITRE ATT&CK technique Data Obfuscation (T1001); ranked in the top 2% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis AI-assisted summary
Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.
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 Data
Microsoft Protected Extensible Authentication Protocol (PEAP) Remote Code Execution Vulnerability
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise Techniques
CVEs Like This One
Affected Assets
Mitigating Controls
Control response
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V1.4.1
Mitigating Controls (NIST CSF 2.0) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.
Vulnerability scanning and recording can discover heap-overflow flaws but does not prevent their introduction in code.
Timely patching removes known heap-overflow instances after they exist.
Secure-development practices directly require bounds checking and safe memory handling that prevent heap overflows.
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.