This article summarizes Microsoft’s December 2025 Patch Tuesday, which addressed 57 vulnerabilities including one actively exploited zero-day. Key threats include remote code execution and privilege escalation flaws across diverse Microsoft products. #CVE202562221 #CVE202564671
Keypoints
- Microsoft fixed 57 security flaws in the December 2025 Patch Tuesday update.
- Among the flaws, three are classified as “Critical,” including remote code execution vulnerabilities.
- An actively exploited zero-day, CVE-2025-62221, involves privilege escalation via Windows Cloud Files Mini Filter Driver.
- Two publicly disclosed zero-day flaws affect GitHub Copilot for Jetbrains and PowerShell, enabling code execution.
- The updates also include fixes for vulnerabilities in Microsoft Edge, Office, Exchange Server, and other components.