{"id":"CVE-2025-21333","aliases":["EUVD-2025-2398","GHSA-gjv6-pfh4-3rff"],"status":"published","title":"Windows Hyper-V NT Kernel Integration VSP Elevation of Privilege Vulnerability","description":"Windows Hyper-V NT Kernel Integration VSP Elevation of Privilege Vulnerability","severity":{"version":"3.1","score":7.8,"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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.10066,"percentile":0.95664,"model":"v2026.06.15"},"facts":{"in_kev":true,"known_exploited":true,"public_exploit":true,"fix_available":false},"cwes":["CWE-122"],"published":"2025-01-14T18:04:50Z","modified":"2026-06-17T08:43:07Z","kev":{"date_added":"2025-01-14","due_date":"2025-02-04","required_action":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","known_ransomware_use":"Unknown"},"exploitation":[{"source":"euvd","since":"2025-01-14"},{"source":"kev","since":"2025-01-14"}],"exploits":[{"source":"pocgithub","id":"MrAle98/CVE-2025-21333-POC","title":"MrAle98/CVE-2025-21333-POC","date":"2025-02-27","url":"https://github.com/MrAle98/CVE-2025-21333-POC"},{"source":"pocgithub","id":"aleongx/KQL_sentinel_CVE-2025-21333","title":"aleongx/KQL_sentinel_CVE-2025-21333","date":"2025-03-11","url":"https://github.com/aleongx/KQL_sentinel_CVE-2025-21333"},{"source":"exploitdb","id":"EDB-52436","title":"Microsoft Windows Server 2025 Hyper-V NT Kernel Integration VSP - Elevation of Privilege","type":"local","platform":"windows","date":"2025-09-16","url":"https://www.exploit-db.com/exploits/52436"},{"source":"pocgithub","id":"nu1lptr0/CVE-2025-21333","title":"nu1lptr0/CVE-2025-21333","date":"2026-05-05","url":"https://github.com/nu1lptr0/CVE-2025-21333"},{"source":"pocgithub","id":"uname1able/CVE-2025-21333","title":"uname1able/CVE-2025-21333","date":"2026-07-16","url":"https://github.com/uname1able/CVE-2025-21333"}],"products":[{"vendor":"microsoft","product":"windows"},{"vendor":"microsoft","product":"windows 10 version 21h2"},{"vendor":"microsoft","product":"windows 10 version 22h2"},{"vendor":"microsoft","product":"windows 11 version 22h2"},{"vendor":"microsoft","product":"windows 11 version 22h3"},{"vendor":"microsoft","product":"windows 11 version 23h2"},{"vendor":"microsoft","product":"windows 11 version 24h2"},{"vendor":"microsoft","product":"windows server 2022, 23h2 edition (server core installation)"},{"vendor":"microsoft","product":"windows server 2025"},{"vendor":"microsoft","product":"windows server 2025 (server core installation)"},{"vendor":"microsoft","product":"windows_10_21h2"},{"vendor":"microsoft","product":"windows_10_22h2"},{"vendor":"microsoft","product":"windows_11_22h2"},{"vendor":"microsoft","product":"windows_11_23h2"},{"vendor":"microsoft","product":"windows_11_24h2"},{"vendor":"microsoft","product":"windows_server_2022_23h2"},{"vendor":"microsoft","product":"windows_server_2025"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21333","tags":["vendor-advisory","patch","Patch","Vendor Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-21333","tags":["government-resource","US Government Resource"]},{"url":"https://www.vicarius.io/vsociety/posts/cve-2025-21333-elevated-privilege-exposure-in-windows-hyper-v-by-microsoft-mitigation-script","tags":["Mitigation","Third Party Advisory"]},{"url":"https://www.vicarius.io/vsociety/posts/cve-2025-21333-elevated-privilege-exposure-in-windows-hyper-v-by-microsoft-detection-script","tags":["Mitigation","Third Party Advisory"]},{"url":"https://www.exploit-db.com/exploits/52436","tags":["Exploit","Third Party Advisory","VDB Entry"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-21333"},{"url":"https://github.com/advisories/GHSA-gjv6-pfh4-3rff"}],"sources":{"cve":[{"id":"CVE-2025-21333","title":"Windows Hyper-V NT Kernel Integration VSP Elevation of Privilege Vulnerability","description":"Windows Hyper-V NT Kernel Integration VSP Elevation of Privilege Vulnerability","status":"published","published":"2025-01-14T18:04:50.962Z","modified":"2026-06-09T18:30:14.696Z","cvss":[{"version":"3.1","score":7.8,"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","level":"high","assessor":"cna"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T14:32:32.30152Z"}],"euvd":[{"id":"EUVD-2025-2398","description":"Windows Hyper-V NT Kernel Integration VSP Elevation of Privilege Vulnerability","status":"published","published":"2025-01-14T18:04:50Z","modified":"2026-06-09T18:30:14Z","cvss":[{"version":"3.1","score":7.8,"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","level":"high"}],"exploited_since":"2025-01-14","updated_at":"2026-11-02T18:20:46.299732Z"}],"ghsa":[{"id":"GHSA-gjv6-pfh4-3rff","title":"Windows Hyper-V NT Kernel Integration VSP Elevation of Privilege Vulnerability","description":"Windows Hyper-V NT Kernel Integration VSP Elevation of Privilege Vulnerability","status":"published","published":"2025-01-14T18:32:05Z","modified":"2025-10-31T15:31:18Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T15:04:16.493141Z"}],"kev":[{"id":"CVE-2025-21333","title":"Microsoft Windows Hyper-V NT Kernel Integration VSP Heap-based Buffer Overflow Vulnerability","description":"Microsoft Windows Hyper-V NT Kernel Integration VSP contains a heap-based buffer overflow vulnerability that allows a local attacker to gain SYSTEM privileges.","cwes":["CWE-122"],"kev":{"date_added":"2025-01-14","due_date":"2025-02-04","required_action":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","known_ransomware_use":"Unknown"},"updated_at":"2026-11-02T17:00:16.234141Z"}],"nvd":[{"id":"CVE-2025-21333","description":"Windows Hyper-V NT Kernel Integration VSP Elevation of Privilege Vulnerability","status":"published","published":"2025-01-14T18:15:58.53Z","modified":"2026-06-17T08:43:07.637Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T14:10:48.713733Z"}]}}