CVE-2024-21338

Microsoft Windows 10 Version 1809, Microsoft Windows 10 Version 21H2, Microsoft Windows 10 Version 22H2

Published 13 Feb 2024 · updated 10 Aug 2026 · Analyzed

7.8 High · CVSS 3.1, microsoft.com

Exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on 4 Mar 2024, with a remediation deadline of 25 Mar 2024 for US federal agencies. It has been used in ransomware campaigns.

Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Description

Windows Kernel Elevation of Privilege Vulnerability

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21338 · Patch, Vendor Advisory
decoded.avast.io/janvojtesek/lazarus-and-the-fudmodule-rootkit-beyond-byovd-with-an-admin-to-kernel-zero-day/ · Exploit, Technical Description, Third Party Advisory
packetstorm.news/files/id/190586/ · Exploit, VDB Entry
www.exploit-db.com/exploits/52275 · Exploit, VDB Entry
www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-21338 · US Government Resource