Microsoft Patch Tuesday Update August 2026 – 394 Vulnerabilities Fixed, Including 3 Zero-Days
Brief
Microsoft has released its August 2026 Patch Tuesday security updates, addressing a massive 394 vulnerabilities across Windows, Microsoft Office, SharePoint Server, Azure services, .NET, PowerShell, Visual Studio Code, and other enterprise products.
The security release, published on August 11, 2026, also includes fixes for three zero-day vulnerabilities, making prompt patching a critical priority for organizations and individual users.
CVE Affected component Impact Severity Publicly disclosed Exploited in the wild CVE-2026-72971 Windows Container Isolation FS Filter Driver ( unionfs.sys ) Tampering Important Yes No CVE-2026-62832 Windows User Profile Service Elevation of Privilege Important Yes No CVE-2026-68820 Windows Ancillary Function Driver for WinSock Elevation of Privilege Important No Yes
CVE-2026-72971 affects the unionfs. sys driver used by Windows Container Isolation.