{"id":"CVE-2026-33826","published":"2026-04-14T16:57:50Z","modified":"2026-10-15T15:53:01Z","title":"Windows Active Directory Remote Code Execution Vulnerability","vendor":"Microsoft","product":"Windows Server 2012 R2","tier":"tail","description":{"text":"Improper input validation in Windows Active Directory allows an authorized attacker to execute code over an adjacent network.","provenance":"source","from":"CVE.org"},"cvss":{"score":8,"severity":"HIGH","version":"3.1","vector":"CVSS:3.1/AV:A/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":0.00535,"percentile":0.44992,"provenance":"source"},"cwes":[{"id":"CWE-20","name":"Improper Input Validation"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33826","tags":["vendor-advisory","patch"]}],"priority":{"score":19.6,"factors":[{"name":"EPSS percentile","points":9.0},{"name":"Public exploit code","points":5.0},{"name":"CVSS severity","points":5.6}]},"exploitSources":{"pocGithub":{"count":1,"skipped":0,"earliest":"2026-04-22","earliestUrl":"https://github.com/kaleth4/CVE-2026-33826","repos":[{"name":"kaleth4/CVE-2026-33826","url":"https://github.com/kaleth4/CVE-2026-33826","stars":1,"created":"2026-04-22"}]},"first":{"date":"2026-04-22","source":"PoC-in-GitHub","url":"https://github.com/kaleth4/CVE-2026-33826"},"provenance":"source"},"vendorSlug":"microsoft","affectedVersions":[{"vendor":"Microsoft","product":"Windows Server 2012 R2","versions":[">= 6.3.9600.0, < 6.3.9600.23132"]},{"vendor":"Microsoft","product":"Windows Server 2012 R2 (Server Core installation)","versions":[">= 6.3.9600.0, < 6.3.9600.23132"]},{"vendor":"Microsoft","product":"Windows Server 2016","versions":[">= 10.0.14393.0, < 10.0.14393.9060"]},{"vendor":"Microsoft","product":"Windows Server 2016 (Server Core installation)","versions":[">= 10.0.14393.0, < 10.0.14393.9060"]},{"vendor":"Microsoft","product":"Windows Server 2019","versions":[">= 10.0.17763.0, < 10.0.17763.8644"]},{"vendor":"Microsoft","product":"Windows Server 2019 (Server Core installation)","versions":[">= 10.0.17763.0, < 10.0.17763.8644"]},{"vendor":"Microsoft","product":"Windows Server 2022","versions":[">= 10.0.20348.0, < 10.0.20348.5020"]},{"vendor":"Microsoft","product":"Windows Server 2022, 23H2 Edition (Server Core installation)","versions":[">= 10.0.25398.0, < 10.0.25398.2274"]},{"vendor":"Microsoft","product":"Windows Server 2025","versions":[">= 10.0.26100.0, < 10.0.26100.32690"]},{"vendor":"Microsoft","product":"Windows Server 2025 (Server Core installation)","versions":[">= 10.0.26100.0, < 10.0.26100.32690"]}],"euvd":{"id":"EUVD-2026-22645","exploited":false,"provenance":"source"},"lineage":{"familyId":"fam-class-microsoft-windows-cwe-20"}}