Microsoft Fixes Record 600+ Vulnerabilities In July 2026 Patch Tuesday, Including Three Zero-Day Flaws

Microsoft has released its July 2026 Patch Tuesday security updates, delivering fixes for a record-breaking 622 vulnerabilities across Windows, Microsoft Office, SharePoint, Azure-related components, Visual Studio, and other products. The release marks the largest Patch Tuesday update in the company’s history and includes patches for three zero-day vulnerabilities, two of which were actively exploited before fixes became available.

The unprecedented volume of security updates reflects a significant shift in Microsoft’s vulnerability discovery strategy. The company recently confirmed that it has begun deploying AI-assisted security research tools to identify vulnerabilities across its Windows codebase at a much faster pace. While this has dramatically increased the number of reported flaws, Microsoft says the goal is to identify and remediate weaknesses before threat actors can weaponize them.