內容說明：
研究人員發現微軟Windows內之瀏覽器排版引擎MSHTML存在安全漏洞(CVE-2021-40444)，MSHTML用於微軟瀏覽器與Office應用程式中，攻擊者可誘騙使用者開啟含有惡意ActiveX之Office文件，進而載入瀏覽器引擎並瀏覽惡意網頁，利用此漏洞遠端執行任意程式碼。
目前已知影響平台如下：
Windows 7 for 32-bit Systems Service Pack 1
Windows 7 for x64-based Systems Service Pack 1
Windows 8.1 for 32-bit systems
Windows 8.1 for x64-based systems
Windows RT 8.1
Windows 10 for 32-bit Systems
Windows 10 for x64-based Systems
Windows 10 Version 1607 for 32-bit Systems
Windows 10 Version 1607 for x64-based Systems
Windows 10 Version 1809 for 32-bit Systems
Windows 10 Version 1809 for ARM64-based Systems
Windows 10 Version 1809 for x64-based Systems
Windows 10 Version 1909 for 32-bit Systems
Windows 10 Version 1909 for ARM64-based Systems
Windows 10 Version 1909 for x64-based Systems
Windows 10 Version 2004 for 32-bit Systems
Windows 10 Version 2004 for ARM64-based Systems
Windows 10 Version 2004 for x64-based Systems
Windows 10 Version 20H2 for 32-bit Systems
Windows 10 Version 20H2 for ARM64-based Systems
Windows 10 Version 20H2 for x64-based Systems
Windows 10 Version 21H1 for 32-bit Systems
Windows 10 Version 21H1 for ARM64-based Systems
Windows 10 Version 21H1 for x64-based Systems
Windows Server 2008 for 32-bit Systems Service Pack 2
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)
Windows Server 2008 for x64-based Systems Service Pack 2
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)
Windows Server 2008 R2 for x64-based Systems Service Pack 1
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
Windows Server 2012
Windows Server 2012 (Server Core installation)
Windows Server 2012 R2
Windows Server 2012 R2 (Server Core installation)
Windows Server 2016
Windows Server 2016 (Server Core installation)
Windows Server 2019
Windows Server 2019 (Server Core installation)
Windows Server 2022
Windows Server 2022 (Server Core installation)
Windows Server, version 2004 (Server Core installation)
Windows Server, version 20H2 (Server Core Installation)
建議措施：
目前微軟官方已針對此漏洞釋出更新程式，請各機關聯絡維護廠商或參考以下網址進行更新：https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-40444
參考資料：
1. https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-40444
2. https://www.ithome.com.tw/news/146584
3. https://docs.microsoft.com/zh-tw/microsoft-365/security/office-365-security/install-app-guard?view=o365-worldwide
