CVE-2024-21338
Windows Kernel Elevation of Privilege Vulnerability
- Published
- Feb 13, 2024
- Updated
- Aug 10, 2026
- Assigning CNA
- microsoft
- Evidence observed
- Mar 4, 2024
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HHigh · next 30 days
- Percentile
- 99.1%
- 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.
CISA Known Exploited
This CVE appears in the CISA Known Exploited Vulnerabilities catalog.
Summary
Windows Kernel Elevation of Privilege Vulnerability
Sources
11Local Privilege Escalation from Admin to Kernel vulnerability on Windows 10 and Windows 11 operating systems with HVCI enabled.
- CVE-2024-21338-ExploitExploit
Proof-of-concept exploit for CVE-2024-21338, a Windows AppLocker driver (appid.sys) privilege escalation vulnerability used by Lazarus group as a 0day. Achieves kernel read/write via crafted IOCTL requests and PreviousMode manipulation.
- CVE-2024-21338Exploit
Windows AppLocker Driver (appid.sys) LPE
Responsible use
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