Microsoft Patch Tuesday – December 2025
ID: 05333578-8b8a-56b2-9b5d-5229de63d2e4
STIX ID: report--05333578-8b8a-56b2-9b5d-5229de63d2e4
Feed Name: Outpost24 Blog
Threat Score
Outpost24’s December 2025 Patch Tuesday summary reports 57 Microsoft vulnerabilities addressed, including three zero-days (one actively exploited). Notable fixes include a use-after-free in the Windows Cloud Files Mini Filter Driver (CVE-2025-62221) enabling local privilege escalation and improper input handling in Copilot and PowerShell (CVE-2025-64671, CVE-2025-54100) allowing local code execution; organisations are advised to promptly apply updates.
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