CVE-2023-21688
HighPublished
NT OS Kernel Elevation of Privilege Vulnerability
- Published
- Feb 14, 2023
- Updated
- Jan 1, 2025
- Assigning CNA
- microsoft
- Evidence observed
- Aug 8, 2026
Primary CVSS
7.8/ 10High
nvd · CVSS 3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H3.6%
Low · next 30 days
- Percentile
- 89.0%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
NT OS Kernel Elevation of Privilege Vulnerability
Sources
1- CVE-2023-21688Exploit
Exploit for CVE-2023-21688 combining a side-channel information leak with a use-after-free (UAF) chain for kernel privilege escalation.
Responsible use
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