Zscaler Security Advisories
Zscaler protects against 6 new vulnerabilities for Microsoft Windows
Zscaler, working with Microsoft through their MAPP program, has proactively deployed protection for the following 6 vulnerabilities included in the October 2021 Microsoft security bulletins. Zscaler will continue to monitor exploits associated with all vulnerabilities in the October release and deploy additional protections, as necessary.
CVE-2021-41357 – Win32k elevation of Privilege Vulnerability
Severity: Important
Affected Software
- Windows 11 for ARM64based Systems
- Windows 11 for x64based Systems
- Windows Server, version 20H2 (Server Core Installation)
- Windows 10 Version 20H2 for ARM64based Systems
- Windows 10 Version 20H2 for 32bit Systems
- Windows 10 Version 20H2 for x64based Systems
- Windows Server, version 2004 (Server Core installation)
- Windows 10 Version 2004 for x64based Systems
- Windows 10 Version 2004 for ARM64based Systems
- Windows 10 Version 2004 for 32bit Systems
- Windows Server 2022 (Server Core installation)
- Windows Server 2022
- Windows 10 Version 21H1 for 32bit Systems
- Windows 10 Version 21H1 for ARM64based Systems
- Windows 10 Version 21H1 for x64based Systems
CVE-2021-40450 – Win32k Elevation of Privilege Vulnerability.
Severity: Important
Affected Software
- Windows 11 for ARM64based Systems
- Windows 11 for x64based Systems
- Windows Server, version 20H2 (Server Core Installation)
- Windows 10 Version 20H2 for ARM64based Systems
- Windows 10 Version 20H2 for 32bit Systems
- Windows 10 Version 20H2 for x64based Systems
- Windows Server, version 2004 (Server Core installation)
- Windows 10 Version 2004 for x64based Systems
- Windows 10 Version 2004 for ARM64based Systems
- Windows 10 Version 2004 for 32bit Systems
- Windows Server 2022 (Server Core installation)
- Windows Server 2022
- Windows 10 Version 21H1 for 32bit Systems
- Windows 10 Version 21H1 for ARM64based Systems
- Windows 10 Version 21H1 for x64based Systems
- Windows 10 Version 1909 for ARM64based Systems
- Windows 10 Version 1909 for x64based Systems
- Windows 10 Version 1909 for 32bit Systems
- Windows Server 2019 (Server Core installation)
- Windows Server 2019
- Windows 10 Version 1809 for ARM64based Systems
- Windows 10 Version 1809 for x64based Systems
- Windows 10 Version 1809 for 32bit Systems
CVE-2021-40467 – Windows Common Log File System Driver Elevation of Privilege Vulnerability.
Severity: Important
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 x64based Systems Service Pack 1 (Server Core installation)
- Windows Server 2008 R2 for x64based Systems Service Pack 1
- Windows Server 2008 for x64based Systems Service Pack 2 (Server Core installation)
- Windows Server 2008 for x64based Systems Service Pack 2
- Windows Server 2008 for 32bit Systems Service Pack 2 (Server Core installation)
- Windows Server 2008 for 32bit Systems Service Pack 2
- Windows RT 8.1
- Windows 8.1 for x64based systems
- Windows 8.1 for 32bit systems
- Windows 7 for x64based Systems Service Pack 1
- Windows 7 for 32bit Systems Service Pack 1
- Windows Server 2016 (Server Core installation)
- Windows Server 2016
- Windows 10 Version 1607 for x64based Systems
- Windows 10 Version 1607 for 32bit Systems
- Windows 10 for x64based Systems
- Windows 10 for 32bit Systems
- Windows 11 for ARM64based Systems
- Windows 11 for x64based Systems
- Windows Server, version 20H2 (Server Core Installation)
- Windows 10 Version 20H2 for ARM64based Systems
- Windows 10 Version 20H2 for 32bit Systems
- Windows 10 Version 20H2 for x64based Systems
- Windows Server, version 2004 (Server Core installation)
- Windows 10 Version 2004 for x64based Systems
- Windows 10 Version 2004 for ARM64based Systems
- Windows 10 Version 2004 for 32bit Systems
- Windows Server 2022 (Server Core installation)
- Windows Server 2022
- Windows 10 Version 21H1 for 32bit Systems
- Windows 10 Version 21H1 for ARM64based Systems
- Windows 10 Version 21H1 for x64based Systems
- Windows 10 Version 1909 for ARM64based Systems
- Windows 10 Version 1909 for x64based Systems
- Windows 10 Version 1909 for 32bit Systems
- Windows Server 2019 (Server Core installation)
- Windows Server 2019
- Windows 10 Version 1809 for ARM64based Systems
- Windows 10 Version 1809 for x64based Systems
- Windows 10 Version 1809 for 32bit Systems
CVE-2021-40470 – DirectX Graphics Kernel Elevation of Privilege Vulnerability
Severity: Important
Affected Software
- Windows Server 2016 (Server Core installation)
- Windows Server 2016
- Windows 10 Version 1607 for x64based Systems
- Windows 10 Version 1607 for 32bit Systems
- Windows 10 for x64based Systems
- Windows 10 for 32bit Systems
- Windows 11 for ARM64based Systems
- Windows 11 for x64based Systems
- Windows Server, version 20H2 (Server Core Installation)
- Windows 10 Version 20H2 for ARM64based Systems
- Windows 10 Version 20H2 for 32bit Systems
- Windows 10 Version 20H2 for x64based Systems
- Windows Server, version 2004 (Server Core installation)
- Windows 10 Version 2004 for x64based Systems
- Windows 10 Version 2004 for ARM64based Systems
- Windows 10 Version 2004 for 32bit Systems
- Windows Server 2022 (Server Core installation)
- Windows Server 2022
- Windows 10 Version 21H1 for 32bit Systems
- Windows 10 Version 21H1 for ARM64based Systems
- Windows 10 Version 21H1 for x64based Systems
- Windows 10 Version 1909 for ARM64based Systems
- Windows 10 Version 1909 for x64based Systems
- Windows 10 Version 1909 for 32bit Systems
- Windows Server 2019 (Server Core installation)
- Windows Server 2019
- Windows 10 Version 1809 for ARM64based Systems
- Windows 10 Version 1809 for x64based Systems
- Windows 10 Version 1809 for 32bit System
CVE-2021-40449 – Win32k Elevation of Privilege Vulnerability.
Severity: Important
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 x64based Systems Service Pack 1 (Server Core installation)
- Windows Server 2008 R2 for x64based Systems Service Pack 1
- Windows Server 2008 for x64based Systems Service Pack 2 (Server Core installation)
- Windows Server 2008 for x64based Systems Service Pack 2
- Windows Server 2008 for 32bit Systems Service Pack 2 (Server Core installation)
- Windows Server 2008 for 32bit Systems Service Pack 2
- Windows RT 8.1
- Windows 8.1 for x64based systems
- Windows 8.1 for 32bit systems
- Windows 7 for x64based Systems Service Pack 1
- Windows 7 for 32bit Systems Service Pack 1
- Windows Server 2016 (Server Core installation)
- Windows Server 2016
- Windows 10 Version 1607 for x64based Systems
- Windows 10 Version 1607 for 32bit Systems
- Windows 10 for x64based Systems
- Windows 10 for 32bit Systems
- Windows 11 for ARM64based Systems
- Windows 11 for x64based Systems
- Windows Server, version 20H2 (Server Core Installation)
- Windows 10 Version 20H2 for ARM64based Systems
- Windows 10 Version 20H2 for 32bit Systems
- Windows 10 Version 20H2 for x64based Systems
- Windows Server, version 2004 (Server Core installation)
- Windows 10 Version 2004 for x64based Systems
- Windows 10 Version 2004 for ARM64based Systems
- Windows 10 Version 2004 for 32bit Systems
- Windows Server 2022 (Server Core installation)
- Windows Server 2022
- Windows 10 Version 21H1 for 32bit Systems
- Windows 10 Version 21H1 for ARM64based Systems
- Windows 10 Version 21H1 for x64based Systems
- Windows 10 Version 1909 for ARM64based Systems
- Windows 10 Version 1909 for x64based Systems
- Windows 10 Version 1909 for 32bit Systems
- Windows Server 2019 (Server Core installation)
- Windows Server 2019
- Windows 10 Version 1809 for ARM64based Systems
- Windows 10 Version 1809 for x64based Systems
- Windows 10 Version 1809 for 32bit Systems