{"id":"CVE-2025-62221","aliases":["EUVD-2025-202200","GHSA-4xhr-vh2p-rpch"],"status":"published","title":"Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability","description":"Use after free in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.","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":"2026-11-12","score":0.02514,"percentile":0.85029,"model":"v2026.06.15"},"facts":{"in_kev":true,"known_exploited":true,"public_exploit":true,"fix_available":false},"cwes":["CWE-416"],"published":"2025-12-09T17:56:10Z","modified":"2026-09-25T23:10:00Z","kev":{"date_added":"2025-12-09","due_date":"2025-12-30","required_action":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","known_ransomware_use":"Unknown"},"exploitation":[{"source":"euvd","since":"2025-12-09"},{"source":"kev","since":"2025-12-09"}],"exploits":[{"source":"pocgithub","id":"Teodor1231241/DEMO-Proof-of-Concept-Temporal-Memory-Inconsistency-in-cldflt.sys-CVE-2025-62221","title":"Teodor1231241/DEMO-Proof-of-Concept-Temporal-Memory-Inconsistency-in-cldflt.sys-CVE-2025-62221","date":"2026-01-18","url":"https://github.com/Teodor1231241/DEMO-Proof-of-Concept-Temporal-Memory-Inconsistency-in-cldflt.sys-CVE-2025-62221"}],"products":[{"vendor":"microsoft","product":"windows"},{"vendor":"microsoft","product":"windows 10 version 1809"},{"vendor":"microsoft","product":"windows 10 version 21h2"},{"vendor":"microsoft","product":"windows 10 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 11 version 25h2"},{"vendor":"microsoft","product":"windows server 2019"},{"vendor":"microsoft","product":"windows server 2019 (server core installation)"},{"vendor":"microsoft","product":"windows server 2022"},{"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_1809"},{"vendor":"microsoft","product":"windows_10_21h2"},{"vendor":"microsoft","product":"windows_10_22h2"},{"vendor":"microsoft","product":"windows_11_23h2"},{"vendor":"microsoft","product":"windows_11_24h2"},{"vendor":"microsoft","product":"windows_11_25h2"},{"vendor":"microsoft","product":"windows_server_2019"},{"vendor":"microsoft","product":"windows_server_2022"},{"vendor":"microsoft","product":"windows_server_2022_23h2"},{"vendor":"microsoft","product":"windows_server_2025"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-62221","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-62221","tags":["government-resource","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-62221"},{"url":"https://github.com/advisories/GHSA-4xhr-vh2p-rpch"}],"sources":{"cve":[{"id":"CVE-2025-62221","title":"Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability","description":"Use after free in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.","status":"published","published":"2025-12-09T17:56:10.169Z","modified":"2026-04-16T14:19:07.492Z","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-416"],"updated_at":"2026-11-02T14:32:55.19484Z"}],"euvd":[{"id":"EUVD-2025-202200","description":"Use after free in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.","status":"published","published":"2025-12-09T17:56:10Z","modified":"2026-04-16T14:19:07Z","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":"2025-12-09","updated_at":"2026-11-02T19:24:23.841547Z"}],"ghsa":[{"id":"GHSA-4xhr-vh2p-rpch","title":"Use after free in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate...","description":"Use after free in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.","status":"published","published":"2025-12-09T18:30:46Z","modified":"2025-12-09T21:32:46Z","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-416"],"updated_at":"2026-11-02T15:05:07.56832Z"}],"kev":[{"id":"CVE-2025-62221","title":"Microsoft Windows Use After Free Vulnerability","description":"Microsoft Windows Cloud Files Mini Filter Driver contains a use after free vulnerability that can allow an authorized attacker to elevate privileges locally.","cwes":["CWE-416"],"kev":{"date_added":"2025-12-09","due_date":"2025-12-30","required_action":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","known_ransomware_use":"Unknown"},"updated_at":"2026-11-02T17:00:15.999436Z"}],"nvd":[{"id":"CVE-2025-62221","description":"Use after free in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.","status":"published","published":"2025-12-09T18:15:56.517Z","modified":"2026-09-25T23:10:00.463Z","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-416"],"updated_at":"2026-11-02T14:11:49.468427Z"}]}}