Posting Date: 2026/04/29

【Vulnerability Alert】Microsoft Released April 2026 Security Updates

  • Subject: 【Vulnerability Alert】Microsoft Released April 2026 Security Updates


  • Description:
    • Forwarded from National Information Security Analysis Center (NISAC) Security Alert NISAC-200-202604-00000009.
    • Microsoft has released security updates for April 2026, patching a total of 165 vulnerabilities. This includes 8 high-risk vulnerabilities and 1 vulnerability that has already been exploited. Please verify and perform patching as soon as possible.
  • Affected Platforms:
    • Affected Platforms - Systems:
    • Azure Logic Apps
    • Microsoft Power App
    • Remote Desktop Client
    • SQL Server
    • .NET
    • .NET Framework
    • .NET and Visual Studio
    • .NET, .NET Framework, Visual Studio
    • Applocker Filter Driver (applockerfltr.sys)
    • Azure Monitor Agent
    • Desktop Window Manager
    • Function Discovery Service (fdwsd.dll)
    • GitHub Copilot and Visual Studio Code
    • Affected Platforms - Software:
    • Windows Advanced Rasterization Platform
    • Windows IKE Extension
    • Windows Push Notifications
    • Windows Shell
    • Microsoft Brokering File System
    • Microsoft Defender
    • Microsoft Dynamics 365 (on-premises)
    • Microsoft Edge (Chromium-based)
    • Microsoft Graphics Component
    • Microsoft High Performance Compute Pack (HPC)
    • Microsoft Management Console
    • Microsoft Office
    • Microsoft Office Excel
    • Microsoft Office PowerPoint
    • Microsoft Office SharePoint
    • Microsoft Office Word
    • Microsoft PowerShell
    • Microsoft Windows
    • Microsoft Windows Search Component
    • Microsoft Windows Speech
    • Role: Windows Hyper-V
    • Universal Plug and Play (upnp.dll)
    • Windows Active Directory
    • Windows Admin Center
    • Windows Ancillary Function Driver for WinSock
    • Windows Biometric Service
    • Windows BitLocker
    • Windows Boot Loader
    • Windows Boot Manager
    • Windows COM
    • Windows Client Side Caching driver (csc.sys)
    • Windows Cloud Files Mini Filter Driver
    • Windows Common Log File System Driver
    • Windows Container Isolation FS Filter Driver
    • Windows Cryptographic Services
    • Windows Encrypting File System (EFS)
    • Windows File Explorer
    • Windows GDI
    • Windows HTTP.sys
    • Windows Hello
    • Windows Installer
    • Windows Kerberos
    • Windows Kernel
    • Windows Kernel Memory
    • Windows LUAFV
    • Windows Local Security Authority Subsystem Service (LSASS)
    • Windows Management Services
    • Windows OLE
    • Windows Print Spooler Components
    • Windows Projected File System
    • Windows RPC API
    • Windows Recovery Environment Agent
    • Windows Redirected Drive Buffering
    • Windows Remote Desktop
    • Windows Remote Desktop Licensing Service
    • Windows Remote Procedure Call
    • Windows SSDP Service
    • Windows Sensor Data Service
    • Windows Snipping Tool
    • Windows Speech Brokered Api
    • Windows Storage Spaces Controller
    • Windows TCP/IP
    • Windows TDI Translation Driver (tdx.sys)
    • Windows USB Print Driver
    • Windows Universal Plug and Play (UPnP) Device Host
    • Windows User Interface Core
    • Windows WFP NDIS Lightweight Filter Driver (wfplwfs.sys)
    • Windows WalletService
    • Windows Win32K - GRFX
    • Windows Win32K - ICOMP
  • Recommended Actions:
  • Reference:
    1. https://msrc.microsoft.com/update-guide/releaseNote/2026-Apr

Computer and Communication Center
Network Systems Division