CVE-2023-21690
CWE-122Published: February 14, 2023· Updated: Jun 17, 2026
Official Description
Microsoft Protected Extensible Authentication Protocol (PEAP) Remote Code Execution Vulnerability
Risk Analysis
Similar to other PEAP vulnerabilities, this flaw allows for remote code execution on affected Windows 10 systems. It is rated as critical due to the potential for total system compromise.
No public exploit is known, and it is not in the CISA KEV. The vulnerability is remotely exploitable with low attack complexity.
Apply the latest security patches from Microsoft to remediate the vulnerability.
Technical Analysis
CVE-2023-21690 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.
CVSS v3.1 Vector Breakdown
Affected Vendors & Products
Exploit & PoC Resources
Official Patches & Advisories
All References (2)
Quick Facts
Related CVEs (CWE-122)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2023-21690 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts