{"id":"CVE-2023-21817","published":"2023-02-14T19:33:19Z","modified":"2026-08-19T16:26:55Z","title":"Windows Kerberos Elevation of Privilege Vulnerability","vendor":"Microsoft","product":"Windows 10 Version 1507","tier":"tail","description":{"text":"Windows Kerberos Elevation of Privilege Vulnerability","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":0.00784,"percentile":0.55928,"provenance":"source"},"cwes":[{"id":"CWE-287","name":"Improper Authentication"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21817","tags":["vendor-advisory","patch"]}],"priority":{"score":21.6,"factors":[{"name":"EPSS percentile","points":11.19},{"name":"Public exploit code","points":5.0},{"name":"CVSS severity","points":5.46}]},"exploitSources":{"pocGithub":{"count":1,"skipped":0,"earliest":"2026-07-22","earliestUrl":"https://github.com/johnnygreeme/CVE-2023-21817","repos":[{"name":"johnnygreeme/CVE-2023-21817","url":"https://github.com/johnnygreeme/CVE-2023-21817","stars":0,"created":"2026-07-22"}]},"first":{"date":"2026-07-22","source":"PoC-in-GitHub","url":"https://github.com/johnnygreeme/CVE-2023-21817"},"provenance":"source"},"vendorSlug":"microsoft","affectedVersions":[{"vendor":"Microsoft","product":"Windows 10 Version 1507","versions":[">= 10.0.10240.0, < 10.0.10240.19747"]},{"vendor":"Microsoft","product":"Windows 10 Version 1607","versions":[">= 10.0.14393.0, < 10.0.14393.5717"]},{"vendor":"Microsoft","product":"Windows 10 Version 1809","versions":[">= 10.0.17763.0, < 10.0.17763.4010"]},{"vendor":"Microsoft","product":"Windows 10 Version 1809","versions":[">= 10.0.0, < 10.0.17763.4010"]},{"vendor":"Microsoft","product":"Windows 10 Version 20H2","versions":[">= 10.0.0, < 10.0.19042.2604"]},{"vendor":"Microsoft","product":"Windows 10 Version 21H2","versions":[">= 10.0.19043.0, < 10.0.19044.2604"]},{"vendor":"Microsoft","product":"Windows 10 Version 22H2","versions":[">= 10.0.19045.0, < 10.0.19045.2604"]},{"vendor":"Microsoft","product":"Windows 11 version 21H2","versions":[">= 10.0.0, < 10.0.22621.1574"]},{"vendor":"Microsoft","product":"Windows 11 version 22H2","versions":[">= 10.0.22621.0, < 10.0.22621.1265"]},{"vendor":"Microsoft","product":"Windows Server 2008  Service Pack 2","versions":[">= 6.0.6003.0, < 6.0.6003.21915"]}],"euvd":{"id":"EUVD-2023-25983","exploited":false,"provenance":"source"},"lineage":{"familyId":"fam-class-microsoft-windows-cwe-287"}}