Description
Use after free in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.
Published: 2025-12-09
Score: 7.8 High
EPSS: 2.2% Low
KEV: Yes
Impact: n/a
Action: n/a
AI Analysis

Impact

The vulnerability is a use‑after‑free flaw in the Windows Cloud Files Mini Filter Driver that allows an authorized local attacker to execute privileged code and elevate privileges. The weakness aligns with CWE‑416 and can be triggered through legitimate user activity on the infected system.

Affected Systems

Microsoft Windows 10 versions 1809, 21H2 and 22H2; Windows 11 versions 22H3, 23H2, 24H2 and 25H2; Windows Server 2019, 2022 and 2025, including Server Core installations. All affected releases run on x86, x64 and arm64 architectures.

Risk and Exploitability

The CVSS score of 7.8 classifies the vulnerability as high severity. An EPSS score of 2 % indicates a measurable probability of exploitation, and the vulnerability is listed in the CISA KEV catalog, confirming it is being exploited in the wild. Exploitation requires an authenticated local user, meaning an attacker must be physically present or otherwise logged on to the target machine.

Generated by OpenCVE AI on May 7, 2026 at 15:18 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Download and install the Microsoft Windows Update that contains the fix for CVE‑2025‑62221.
  • Reboot the affected machines so the updated Cloud Files Mini Filter Driver takes effect.
  • Enforce least privilege for local users, disable unnecessary administrative tools, and monitor event logs for abnormal file operation failures that might indicate exploitation attempts.

Generated by OpenCVE AI on May 7, 2026 at 15:18 UTC.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

Wed, 10 Dec 2025 14:00:00 +0000

Type Values Removed Values Added
First Time appeared Microsoft windows 10 21h2
Microsoft windows 10 22h2
Microsoft windows 11 23h2
Microsoft windows 11 24h2
Microsoft windows 11 25h2
Microsoft windows Server 2022 23h2
CPEs cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:*
Vendors & Products Microsoft windows 10 21h2
Microsoft windows 10 22h2
Microsoft windows 11 23h2
Microsoft windows 11 24h2
Microsoft windows 11 25h2
Microsoft windows Server 2022 23h2

Tue, 09 Dec 2025 19:15:00 +0000

Type Values Removed Values Added
References
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'active', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Tue, 09 Dec 2025 18:45:00 +0000

Type Values Removed Values Added
Metrics kev

{'dateAdded': '2025-12-09T00:00:00+00:00', 'dueDate': '2025-12-30T00:00:00+00:00'}

Tue, 09 Dec 2025 18:15:00 +0000

Type Values Removed Values Added
Description Use after free in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.
Title Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability
First Time appeared Microsoft
Microsoft windows 10 1809
Microsoft windows 10 21h2
Microsoft windows 10 22h2
Microsoft windows 11 23h2
Microsoft windows 11 24h2
Microsoft windows 11 25h2
Microsoft windows Server 2019
Microsoft windows Server 2022
Microsoft windows Server 2025
Microsoft windows Server 23h2
Weaknesses CWE-416
CPEs cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_10_21H2:*:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_10_22H2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_11_24H2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_25H2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_23h2:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft windows 10 1809
Microsoft windows 10 21h2
Microsoft windows 10 22h2
Microsoft windows 11 23h2
Microsoft windows 11 24h2
Microsoft windows 11 25h2
Microsoft windows Server 2019
Microsoft windows Server 2022
Microsoft windows Server 2025
Microsoft windows Server 23h2
References
Metrics cvssV3_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'}

Subscriptions

Microsoft Windows 10 1809 Windows 10 21h2 Windows 10 21h2 Windows 10 22h2 Windows 10 22h2 Windows 11 23h2 Windows 11 23h2 Windows 11 24h2 Windows 11 24h2 Windows 11 25h2 Windows 11 25h2 Windows Server 2019 Windows Server 2022 Windows Server 2022 23h2 Windows Server 2025 Windows Server 23h2
cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2026-04-16T14:19:07.492Z

Reserved: 2025-10-08T20:10:09.349Z

Link: CVE-2025-62221

cve-icon Vulnrichment

Updated: 2025-12-09T18:29:43.542Z

cve-icon NVD

Status : Analyzed

Published: 2025-12-09T18:15:56.517

Modified: 2025-12-10T13:48:09.333

Link: CVE-2025-62221

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-07T15:30:06Z

Weaknesses