Microsoft Patch Tuesday Update August 2026 – 394 Vulnerabilities Fixed, Including 3 Zero-Days

Microsoft has released its August 2026 Patch Tuesday security updates, addressing over 394 vulnerabilities across various Microsoft products including Windows, Office, SharePoint Server, Azure services, .NET, PowerShell, Visual Studio Code, and more.

CVE Number CVE Title Max Severity CVE-2026-72971 Windows Container Isolation FS Filter Driver (unionfs.sys) Tampering Vulnerability Important CVE-2026-71331 Windows Device Health Attestation (DHA) Remote Code Execution Vulnerability Critical CVE-2026-70355 Microsoft SharePoint Server Elevation of Privilege Vulnerability Important CVE-2026-70354 .NET Core Remote Code Execution Vulnerability Important CVE-2026-70348 Windows Management Services Denial of Service Vulnerability Important CVE-2026-70347 Windows Installer Elevation of Privilege Vulnerability Important CVE-2026-70346 Windows Installer Elevation of Privilege Vulnerability Important CVE-2026-70345 Windows Installer Elevation of Privilege Vulnerability Important CVE-2026-70344 Windows Installer Elevation of Privilege Vulnerability Important CVE-2026-70340 Azure CycleCloud Elevation of Privilege Vulnerability Important CVE-2026-70338 Microsoft PowerShell Security Feature Bypass Vulnerability Important CVE-2026-70337 Microsoft PowerShell Remote Code Execution Vulnerability Important CVE-2026-70336 Visual Studio Code Remote Code Execution Vulnerability Important CVE-2026-70335 GitHub Copilot and Visual Studio Code Elevation of Privilege Vulnerability Important CVE-2026-70330 Windows DNS Elevation of Privilege Vulnerability Important CVE-2026-70329 Microsoft Outlook Remote Code Execution Vulnerability Important CVE-2026-70328 Microsoft Excel Information Disclosure Vulnerability Important CVE-2026-70327 Microsoft Excel Information Disclosure Vulnerability Important CVE-2026-70326 Microsoft SharePoint Server Elevation of Privilege Vulnerability Important CVE-2026-70325 Powerpoint Information Disclosure Vulnerability Important CVE-2026-70324 Microsoft SharePoint Elevation of Privilege Vulnerability Important CVE-2026-70323 Microsoft Office Information Disclosure Vulnerability Important CVE-2026-70322 Powerpoint Information Disclosure Vulnerability Important CVE-2026-70321 Microsoft SharePoint Remote Code Execution Vulnerability Important CVE-2026-70320 Powerpoint Information Disclosure Vulnerability Important CVE-2026-70319 Microsoft Office Word Information Disclosure Vulnerability Important CVE-2026-70318 Microsoft Excel Information Disclosure Vulnerability Important CVE-2026-70317 Microsoft Office Information Disclosure Vulnerability Important CVE-2026-70316 Powerpoint Information Disclosure Vulnerability Important CVE-2026-70315 Microsoft Office Information Disclosure Vulnerability Important CVE-2026-70314 Microsoft Office Information Disclosure Vulnerability Important CVE-2026-70313 Microsoft PowerPoint Remote Code Execution Vulnerability Important CVE-2026-70312 Powerpoint Information Disclosure Vulnerability Important CVE-2026-70311 Microsoft Office Word Remote Code Execution Vulnerability Important CVE-2026-70310 Microsoft Word Information Disclosure Vulnerability Important CVE-2026-70307 Windows Ancillary Function Driver...