{"id":"CVE-2026-77503","published":"2026-09-08T17:13:23Z","modified":"2026-10-30T21:51:48Z","title":"Windows NTFS Elevation of Privilege Vulnerability","vendor":"Microsoft","product":"Windows 10 Version 1607","tier":"tail","description":{"text":"Out-of-bounds read in Windows NTFS allows an unauthorized attacker to elevate privileges locally.","provenance":"source","from":"CVE.org"},"cvss":{"score":8.4,"severity":"HIGH","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","provenance":"source","from":"CVE.org CNA"},"epss":{"score":0.00337,"percentile":0.27068,"provenance":"source"},"cwes":[{"id":"CWE-125","name":"Out-of-bounds Read"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-77503","tags":["vendor-advisory","patch"]}],"priority":{"score":11.3,"factors":[{"name":"EPSS percentile","points":5.41},{"name":"CVSS severity","points":5.88}]},"vendorSlug":"microsoft","affectedVersions":[{"vendor":"Microsoft","product":"Windows 10 Version 1607","versions":[">= 10.0.14393.0, < 10.0.14393.9512"]},{"vendor":"Microsoft","product":"Windows 10 Version 1809","versions":[">= 10.0.17763.0, < 10.0.17763.9245"]},{"vendor":"Microsoft","product":"Windows 10 Version 21H2","versions":[">= 10.0.19044.0, < 10.0.19044.7725"]},{"vendor":"Microsoft","product":"Windows 10 Version 22H2","versions":[">= 10.0.19045.0, < 10.0.19045.7725"]},{"vendor":"Microsoft","product":"Windows 11 version 23H2","versions":[">= 10.0.22631.0, < 10.0.22631.7582"]},{"vendor":"Microsoft","product":"Windows 11 Version 23H2","versions":[">= 10.0.22631.0, < 10.0.22631.7582"]},{"vendor":"Microsoft","product":"Windows 11 Version 24H2","versions":[">= 10.0.26100.0, < 10.0.26100.9445"]},{"vendor":"Microsoft","product":"Windows 11 Version 25H2","versions":[">= 10.0.26200.0, < 10.0.26200.9445"]},{"vendor":"Microsoft","product":"Windows 11 version 26H1","versions":[">= 10.0.28000.0, < 10.0.28000.2954"]},{"vendor":"Microsoft","product":"Windows Server 2012","versions":[">= 6.2.9200.0, < 6.2.9200.26349"]}],"euvd":{"id":"EUVD-2026-73272","exploited":false,"provenance":"source"},"lineage":{"familyId":"fam-class-microsoft-windows-cwe-125"}}