Microsoft Patch Tuesday, December 2025 Edition
Summary
Microsoft's December 2025 Patch Tuesday addresses 56 security flaws, including one zero-day vulnerability being actively exploited and two publicly disclosed vulnerabilities. The update covers Windows operating systems and supported software.
IFF Assessment
FOE
The presence of an actively exploited zero-day vulnerability and publicly disclosed vulnerabilities poses an immediate threat to systems that are not promptly updated.
Severity
9.0
Critical
(AI Estimated)
Defender Context
This Patch Tuesday should be a high priority for defenders. Actively exploited zero-days demand immediate attention and patching. Defenders should prioritize patching based on the severity of vulnerabilities and potential impact on their environment, staying vigilant for exploit attempts.