CVE-2025-62221

Published Dec 9, 2025

Last updated 7 days ago

Windows

Cloud Files Mini Filter Driver

Overview

AI description

Automated description summarized from trusted sources.

CVE-2025-62221 is an elevation of privilege vulnerability affecting the Windows Cloud Files Mini Filter Driver. It stems from a use-after-free issue within the driver. An attacker with local access and some privileges can exploit this vulnerability to gain SYSTEM-level privileges. Successful exploitation of CVE-2025-62221 allows an attacker to gain full control of a Windows system. The attack complexity is low, and no user interaction is required. This vulnerability is actively being exploited.

Description: Use after free in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.
Source: secure@microsoft.com
NVD status: Analyzed
Products: windows_10_1809, windows_10_21h2, windows_10_22h2, windows_11_23h2, windows_11_24h2, windows_11_25h2, windows_server_2019, windows_server_2022, windows_server_2022_23h2, windows_server_2025

Risk scores

CVSS 3.1

Type: Secondary
Base score: 7.8
Impact score: 5.9
Exploitability score: 1.8
Vector string: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Severity: HIGH

Known exploits

Data from CISA

Vulnerability name: Microsoft Windows Use After Free Vulnerability
Exploit added on: Dec 9, 2025
Exploit action due: Dec 30, 2025
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.

Weaknesses

secure@microsoft.com: CWE-416

Hype score is a measure of social media activity compared against trending CVEs from the past 12 months. Max score 100.

Hype score: 1

Configurations

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References

Sources include official advisories and independent security research.