{"id":"CVE-2026-33841","published":"2026-05-12T16:58:20Z","modified":"2026-08-10T15:14:00Z","title":"Windows Kernel Elevation of Privilege Vulnerability","vendor":"Microsoft","product":"Windows 10 Version 21H2","tier":"tail","description":{"text":"Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.","provenance":"source","from":"CVE.org"},"cvss":{"score":7.8,"severity":"HIGH","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","provenance":"source","from":"CVE.org CNA"},"epss":{"score":0.0031,"percentile":0.23827,"provenance":"source"},"cwes":[{"id":"CWE-122","name":"Heap-based Buffer Overflow"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33841","tags":["vendor-advisory","patch"]}],"priority":{"score":10.2,"factors":[{"name":"EPSS percentile","points":4.77},{"name":"CVSS severity","points":5.46}]},"vendorSlug":"microsoft","affectedVersions":[{"vendor":"Microsoft","product":"Windows 10 Version 21H2","versions":[">= 10.0.19044.0, < 10.0.19044.7291"]},{"vendor":"Microsoft","product":"Windows 10 Version 22H2","versions":[">= 10.0.19045.0, < 10.0.19045.7417"]},{"vendor":"Microsoft","product":"Windows 11 version 23H2","versions":[">= 10.0.22631.0, < 10.0.22631.7079"]},{"vendor":"Microsoft","product":"Windows 11 Version 23H2","versions":[">= 10.0.22631.0, < 10.0.22631.7219"]},{"vendor":"Microsoft","product":"Windows 11 Version 24H2","versions":[">= 10.0.26100.0, < 10.0.26100.8457"]},{"vendor":"Microsoft","product":"Windows 11 Version 25H2","versions":[">= 10.0.26200.0, < 10.0.26200.8457"]},{"vendor":"Microsoft","product":"Windows 11 version 26H1","versions":[">= 10.0.28000.0, < 10.0.28000.2113"]},{"vendor":"Microsoft","product":"Windows Server 2022","versions":[">= 10.0.20348.0, < 10.0.20348.5139"]},{"vendor":"Microsoft","product":"Windows Server 2022, 23H2 Edition (Server Core installation)","versions":[">= 10.0.25398.0, < 10.0.25398.2330"]},{"vendor":"Microsoft","product":"Windows Server 2025","versions":[">= 10.0.26100.0, < 10.0.26100.32860"]}],"euvd":{"id":"EUVD-2026-29587","exploited":false,"provenance":"source"},"lineage":{"familyId":"fam-class-microsoft-windows-cwe-122"}}