Microsoft Fixes 79 Flaws in March Patch Tuesday, Including Two 0-Days

Microsoft fixes 79 vulnerabilities in March 2026 Patch Tuesday, including two publicly disclosed 0-days affecting SQL Server, .NET and Windows systems.

Microsoft has released its March 2026 Patch Tuesday security updates, addressing dozens of vulnerabilities across Windows, enterprise platforms, and developer frameworks. The monthly update resolves 79 security flaws, including three critical vulnerabilities and two publicly disclosed zero-day issues, according to security researchers and vulnerability trackers.

Patch Tuesday, Microsoft’s monthly security update cycle delivered on the second Tuesday of each month, provides fixes for security vulnerabilities affecting its products, from Windows and Office to cloud services and developer frameworks.

Overview of the March 2026 Patch Tuesday

The March release includes fixes for 79 Microsoft CVEs, most rated “Important,” with a smaller number categorized as “Critical.”

Breakdown of vulnerabilities:

1. 3 Critical severity vulnerabilities
2. 79 total vulnerabilities addressed
3. 76 Important severity vulnerabilities
4. 2 publicly disclosed vulnerabilities (zero-days)
5. No confirmed active exploitation ...