Zscaler protects against 4 new vulnerabilities for Windows

Zscaler, working with Microsoft through their MAPP program, has proactively deployed protection for the following 4 vulnerabilities included in the April 2025 Microsoft security bulletins. Zscaler will continue to monitor exploits associated with all vulnerabilities in the April release and deploy additional protections, as necessary.

CVE-2025-27472 – Windows Mark of the Web Security Feature Bypass Vulnerability

Severity: Important

Subscriptions Required

Affected Software

• Windows Server 2012 R2 (Server Core installation)
• Windows Server 2012 R2
• Windows Server 2012 (Server Core installation)
• Windows Server 2012
• Windows 10 for x64-based Systems
• Windows 10 for 32-bit Systems

CVE-2025-29812 – DirectX Graphics Kernel Elevation of Privilege Vulnerability

Severity: Important

Subscriptions Required

Affected Software

• Windows Server 2025
• Windows 11 Version 24H2 for x64-based Systems
• Windows 11 Version 24H2 for ARM64-based Systems
• Windows Server 2022, 23H2 Edition (Server Core installation)
• Windows 11 Version 23H2 for x64-based Systems
• Windows 11 Version 23H2 for ARM64-based Systems
• Windows Server 2025 (Server Core installation)
• Windows 11 Version 22H2 for x64-based Systems
• Windows 11 Version 22H2 for ARM64-based Systems
• Windows Server 2022 (Server Core installation)
• Windows Server 2022

CVE-2025-29809 – Windows Kerberos Security Feature Bypass Vulnerability

Severity: Important

Subscriptions Required

Affected Software

• Windows 11 Version 23H2 for x64-based Systems
• Windows 11 Version 22H2 for ARM64-based Systems
• Windows 10 Version 21H2 for x64-based Systems
• Windows 10 Version 21H2 for ARM64-based Systems
• Windows 11 Version 23H2 for ARM64-based Systems
• Windows Server 2025 (Server Core installation)
• Windows 10 Version 22H2 for 32-bit Systems
• Windows 10 Version 22H2 for ARM64-based Systems
• Windows 10 Version 22H2 for x64-based Systems
• Windows 11 Version 22H2 for x64-based Systems
• Windows 10 Version 21H2 for 32-bit Systems
• Windows Server 2022 (Server Core installation)
• Windows Server 2022
• Windows Server 2019 (Server Core installation)
• Windows Server 2019
• Windows 10 Version 1809 for x64-based Systems
• Windows 10 Version 1809 for 32-bit Systems
• Windows 10 Version 1607 for x64-based Systems
• Windows 10 Version 1607 for 32-bit Systems
• Windows 10 for x64-based Systems
• Windows 10 for 32-bit Systems
• Windows Server 2025
• Windows 11 Version 24H2 for x64-based Systems
• Windows 11 Version 24H2 for ARM64-based Systems
• Windows Server 2022, 23H2 Edition (Server Core installation)
• Windows Server 2016 (Server Core installation)
• Windows Server 2016

CVE-2025-27482 – Windows Remote Desktop Services Remote Code Execution Vulnerability

Severity: Critical

Subscriptions Required

Affected Software

• Windows Server 2022, 23H2 Edition (Server Core installation)
• Windows Server 2025 (Server Core installation)
• Windows Server 2022 (Server Core installation)
• Windows Server 2022
• Windows Server 2019 (Server Core installation)
• Windows Server 2019
• Windows Server 2016 (Server Core installation)
• Windows Server 2016
• Windows Server 2025