Microsoft Patches 55 Security Flaws Including Four Zero Day Vulnerabilities

Microsoft’s February 2025 Patch Tuesday addresses 55 security vulnerabilities, including four zero-day flaws with two under active exploitation in the wild. The security update batch focuses on critical fixes across Windows operating systems, Microsoft Edge browser, and Dynamics 365 Sales, demonstrating Microsoft’s swift response to emerging security threats.

Table of Contents

Key Takeaways:

Four zero-day vulnerabilities patched, with two being actively exploited by attackers
Updates address 22 Remote Code Execution and 19 Elevation of Privilege vulnerabilities
Critical fixes deployed for Windows Storage and WinSock components
Microsoft Edge receives patches for 10 security flaws
Immediate updates recommended for all affected Windows systems

Zero-Day Vulnerabilities: Immediate Action Required

The February security update primarily targets four zero-day vulnerabilities, with two under active exploitation. The most severe, CVE-2025-21391, affects Windows Storage services and could let attackers delete critical system files. The second actively exploited flaw, CVE-2025-21418, impacts the Windows Ancillary Function Driver, potentially granting attackers SYSTEM-level access.

These vulnerabilities pose significant risks to both individual users and organizations. The Windows security landscape requires constant vigilance, making these patches crucial for maintaining system integrity.

Critical Vulnerability Breakdown

The security update addresses multiple critical vulnerabilities across Microsoft’s product range. Remote code execution flaws make up the largest portion of the fixes, followed by elevation of privilege vulnerabilities. I’ve noticed that denial of service vulnerabilities represent a significant portion of the patched issues.

Recent security enhancements have helped strengthen Windows defenses, but these patches remain essential for complete protection.

Impact on Microsoft Products

Microsoft Edge users receive significant security improvements with patches for 10 vulnerabilities. Additionally, Dynamics 365 Sales gets an important security update addressing an elevation of privilege flaw. Microsoft’s ongoing product updates continue to address security concerns across their ecosystem.

Recommended Actions

Immediate installation of these security updates is crucial. If you’re looking to automate your update process and other business operations, consider using Latenode’s automation tools to streamline your security maintenance. Here are the key steps to take: