Zscaler protects against 3 new vulnerabilities for Windows

Zscaler, working with Microsoft through their MAPP program, has proactively deployed protection for the following 3 vulnerabilities included in the May 2025 Microsoft security bulletins. Zscaler will continue to monitor exploits associated with all vulnerabilities in the May release and deploy additional protections, as necessary.

CVE-2025-30388 – Windows Graphics Component Remote Code Execution Vulnerability

Severity: Important

Subscriptions Required

• Advanced Threat Protection
• Advanced Cloud Sandbox

Affected Software

• Windows Server 2012 R2 (Server Core installation)
• Windows Server 2012 R2
• Windows Server 2012 (Server Core installation)
• Windows Server 2012
• Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
• Windows Server 2008 R2 for x64-based Systems Service Pack 1
• Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)
• Windows Server 2008 for x64-based Systems Service Pack 2
• Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)
• Windows Server 2008 for 32-bit Systems Service Pack 2
• Windows Server 2016 (Server Core installation)
• Windows Server 2016
• 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 11 Version 23H2 for x64-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 11 Version 22H2 for ARM64-based Systems
• Windows 10 Version 21H2 for x64-based Systems
• Windows 10 Version 21H2 for ARM64-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
• Microsoft Office LTSC for Mac 2024
• Microsoft Office for Universal
• Microsoft Office for Android
• Microsoft Office LTSC for Mac 2021

CVE-2025-30377 – Microsoft Office Remote Code Execution Vulnerability

Severity: Critical

Subscriptions Required

• Advanced Threat Protection

Affected Software

• Microsoft Office 2019 for 32-bit editions
• Microsoft Office 2016 (64-bit edition)
• Microsoft Office 2016 (32-bit edition)
• Microsoft Office LTSC for Mac 2024
• Microsoft Office LTSC 2024 for 64-bit editions
• Microsoft Office LTSC 2024 for 32-bit editions
• Microsoft Office for Android
• Microsoft Office LTSC 2021 for 32-bit editions
• Microsoft Office LTSC 2021 for 64-bit editions
• Microsoft Office LTSC for Mac 2021
• Microsoft 365 Apps for Enterprise for 64-bit Systems
• Microsoft 365 Apps for Enterprise for 32-bit Systems
• Microsoft Office 2019 for 64-bit editions

CVE-2025-30386 – Microsoft Office Remote Code Execution Vulnerability

Severity: Critical

Subscriptions Required

• Advanced Threat Protection

Affected Software

• Microsoft Office 2016 (64-bit edition)
• Microsoft Office 2016 (32-bit edition)
• Microsoft Office LTSC for Mac 2024
• Microsoft Office LTSC 2024 for 64-bit editions
• Microsoft Office LTSC 2024 for 32-bit editions
• Microsoft Office for Android
• Microsoft Office LTSC 2021 for 32-bit editions
• Microsoft Office LTSC 2021 for 64-bit editions
• Microsoft Office LTSC for Mac 2021
• Microsoft 365 Apps for Enterprise for 64-bit Systems
• Microsoft 365 Apps for Enterprise for 32-bit Systems
• Microsoft Office 2019 for 64-bit editions
• Microsoft Office 2019 for 32-bit editions