ClosedHighPatched

Microsoft Windows: Windows Use After Free Vulnerability

Microsoft Windows

Microsoft Windows Cloud Files Mini Filter Driver contains a use after free vulnerability that can allow an authorized attacker to elevate privileges locally. Added to CISA KEV on 2025-12-09.

Why this severity: CVSS 7.8 (CNA, v3.1); actively exploited (CISA KEV)

Started: Dec 9, 2025
Closed: Dec 9, 2025
CVE: CVE-2025-62221

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Updated Dec 9, 2025

Affected

See vendor advisory / CISA notes (versions not always listed in KEV feed)

Fixed in

See vendor advisory linked in sources

Timeline1

Dec 9, 2025
CISA added CVE-2025-62221 to the KEV catalog (due 2025-12-30).

Advisories3

Notes & caveats

Derived from CISA KEV JSON feed catalogVersion 2026.10.21. CVSS from the CVE record (cvelistV5). Exact affected/fixed version strings are not always in the KEV record; verify against the vendor advisory URL. startedAt uses dateAdded (exploitation may have begun earlier; many entries are older CVEs newly confirmed as exploited in 2025).

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