【Vulnerability Alert】Microsoft has released the September 2026 security update

• Subject:【Vulnerability Alert】Microsoft has released the September 2026 security update

• Description:
  • Forwarded from the National Information Security Alert and Analysis Center security message alert NISAC-200-202609-00000017
  • Microsoft has released the September 2026 security update, which fixes 978 vulnerabilities, including 193 high-risk vulnerabilities and 2 vulnerabilities that have been actively exploited. Please verify and apply the patch as soon as possible.
• Affected Platforms:
  • .NET and Visual Studio
  • Azure AI Language
  • Azure Arc
  • Copilot Studio
  • Entra ID
  • Graphic Fonts
  • Microsoft Azure Active Directory B2C
  • Microsoft Dynamics 365
  • Microsoft Edge (Chromium-based)
  • Microsoft Entra ID
• Recommended Actions:
  • Microsoft has released fixed versions for the vulnerabilities. Please contact your system maintenance vendor or refer to the following link: https://msrc.microsoft.com/update-guide/releaseNote/2026-Sep
• References:
  1. https://msrc.microsoft.com/update-guide/releaseNote/2026-Sep

Computer and Communication Center
Network System Division