Security Advisory - November 9, 2021

Zscaler protects against 3 new vulnerabilities for Microsoft Windows, Office, and Malware Protection Engine

Zscaler, working with Microsoft through their MAPP program, has proactively deployed protection for the following 3 vulnerabilities included in the November 2021 Microsoft security bulletins. Zscaler will continue to monitor exploits associated with all vulnerabilities in the November release and deploy additional protections, as necessary.

 

CVE-2021-42292 – Microsoft Excel Security Feature Bypass Vulnerability.

Severity: Important

Affected Software

  • Microsoft Office 2013 Service Pack 1 (64-bit editions)
  • Microsoft Office 2013 Service Pack 1 (32-bit editions)
  • Microsoft Office 2013 RT Service Pack 1
  • Microsoft Excel 2013 Service Pack 1 (64-bit editions)
  • Microsoft Excel 2013 Service Pack 1 (32-bit editions)
  • Microsoft Excel 2013 RT Service Pack 1
  • Microsoft Office 2016 (64-bit edition)
  • Microsoft Office 2016 (32-bit edition)
  • Microsoft Excel 2016 (64-bit edition)
  • Microsoft Excel 2016 (32-bit edition)
  • 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 Mac
  • Microsoft Office 2019 for 64-bit editions
  • Microsoft Office 2019 for 32-bit editions

 

CVE-2021-42298 – Microsoft Defender Remote Code Execution Vulnerability.

Severity: Critical

Affected Software

  • Microsoft Malware Protection Engine

 

CVE-2021-38666 – Remote Desktop Client Remote Code Execution Vulnerability.

Severity: Critical

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 RT 8.1
  • Windows 8.1 for x64-based systems
  • Windows 8.1 for 32-bit systems
  • Windows 7 for x64-based Systems Service Pack 1
  • Windows 7 for 32-bit Systems Service Pack 1
  • 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 11 for ARM64-based Systems
  • Windows 11 for x64-based Systems
  • Windows Server, version 20H2 (Server Core Installation)
  • Windows 10 Version 20H2 for ARM64-based Systems
  • Windows 10 Version 20H2 for 32-bit Systems
  • Windows 10 Version 20H2 for x64-based Systems
  • Windows Server, version 2004 (Server Core installation)
  • Windows 10 Version 2004 for x64-based Systems
  • Windows 10 Version 2004 for ARM64-based Systems
  • Windows 10 Version 2004 for 32-bit Systems
  • Windows Server 2022 (Server Core installation)
  • Windows Server 2022
  • Windows 10 Version 21H1 for 32-bit Systems
  • Windows 10 Version 21H1 for ARM64-based Systems
  • Windows 10 Version 21H1 for x64-based Systems
  • Remote Desktop client for Windows Desktop
  • Windows 10 Version 1909 for ARM64-based Systems
  • Windows 10 Version 1909 for x64-based Systems
  • Windows 10 Version 1909 for 32-bit Systems
  • Windows Server 2019 (Server Core installation)
  • Windows Server 2019
  • Windows 10 Version 1809 for ARM64-based Systems
  • Windows 10 Version 1809 for x64-based Systems
  • Windows 10 Version 1809 for 32-bit Systems