3 Actively Exploited Zero-Day Flaws Patched in Microsoft's Latest Security Update

Microsoft kicked off 2025 with a new set of patches for a total of 161 security vulnerabilities across its software portfolio, including three zero-days that have been actively exploited in attacks. Of the 161 flaws, 11 are rated Critical, and 149 are rated Important in severity. One other flaw, a non-Microsoft CVE related to a Windows Secure Boot bypass (CVE-2024-7344), has not been assigned