CVE-2025-62221

HIGH CISA KEV

Published Dec 9, 2025 Modified Dec 10, 2025 CWE-416

Description

Use after free in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.

CVSS v3.1 Score

7.8

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA Known Exploited Vulnerability

This vulnerability is actively exploited in the wild.

Added: Dec 9, 2025 Remediation due: Dec 30, 2025

Weakness Type (CWE)

CWE-416 Use After Free

Affected Products

Vendor	Product	Versions
microsoft	windows_10_1809	< 10.0.17763.8146
microsoft	windows_10_1809	< 10.0.17763.8146
microsoft	windows_10_21h2	< 10.0.19044.6691
microsoft	windows_10_22h2	< 10.0.19045.6691
microsoft	windows_11_23h2	< 10.0.22631.6345
microsoft	windows_11_24h2	< 10.0.26100.7392
microsoft	windows_11_25h2	< 10.0.26200.7392
microsoft	windows_server_2019	< 10.0.17763.8146
microsoft	windows_server_2022	< 10.0.20348.4467
microsoft	windows_server_2022_23h2	< 10.0.25398.2025
microsoft	windows_server_2025	< 10.0.26100.7392

References

Advisories & Patches

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-62221

Other References

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-62221

Frequently Asked Questions

What is CVE-2025-62221? +

Use after free in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally. It has a CVSS v3.1 base score of 7.8 (HIGH). This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog, indicating active exploitation in the wild.

How severe is CVE-2025-62221? +

CVE-2025-62221 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-62221? +

CVE-2025-62221 affects products from microsoft, specifically: 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. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-62221? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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