Today is Microsoft' 2025 Patch Tuesday, which includes security updates for 55 flaws, including four zero-day vulnerabilities, with two actively exploited in attacks.

CVE-2025-21391, the zero-day Windows storage flaw, stems from the way Windows resolves file paths and follows links, Walters said. File deletion is just the beginning of the problems it could cause, as it could lead to privilege escalation, unwanted access to security logs or configurations, malware injection, data manipulation, or other attacks.

Microsoft is correcting 57 vulnerabilities in its February Patch Tuesday, two of which are being actively exploited in the wild, and three of which are ‘critical’.

All supported Windows operating systems will receive an update this month for a buffer overflow vulnerability that carries the catchy name CVE-2025-21418. This patch should be a priority for enterprises, as Microsoft says it is being exploited, has low attack complexity, and no requirements for user interaction.

The latest updates resolve more glitches and security flaws - some critical - in Windows 11 23H2 and 24H2, so you'll want to install them sooner rather than later.

Microsoft patches 63 flaws, including two exploited Windows vulnerabilities (CVE-2025-21391, CVE-2025-21418). CISA requires fixes by March 4.

Microsoft patched 63 CVEs in the February 2025 Patch Tuesday updates. Here are the most dangerous threats that were avoided.

Microsoft has rolled out the February 2025 Patch Tuesday updates, KB5051987 and KB5051989, for Windows 11 24H2 and 23H2, as reported by Bleeping Computer. After installing the updates, the build number for Windows 11 version 24H2 will change to Build 26100.

Microsoft’s February 2025 cumulative update brings much-needed relief to Windows 11 users, fixing Auto HDR issues that caused game crashes, audio output disruptions, and USB webcam detection problems,