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Microsoft .NET Framework Update Version KB5120747

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Update Summary

August 11, 2026 cumulative update for .NET Framework adds security fixes for CVE-2026-65810, CVE-2026-62872, CVE-2026-62886, CVE-2026-62897, CVE-2026-62902, and CVE-2026-70354. No quality improvements or known issues are listed.

Update Details

Security

  • Addresses an elevation of privilege vulnerability in CVE-2026-65810.
  • Addresses an elevation of privilege vulnerability in CVE-2026-62872.
  • Addresses a remote code execution vulnerability in CVE-2026-62886.
  • Addresses a remote code execution vulnerability in CVE-2026-62897.
  • Addresses an information disclosure vulnerability in CVE-2026-62902.
  • Addresses a remote code execution vulnerability in CVE-2026-70354.

Hints

  • For Windows 11, version 26H1 and newer, the .NET Framework 3.5 product update KB5120747 installs the complete .NET Framework 3.5 product as a standalone installer and replaces any previously installed version.
  • The operating system KB is used for update offering; the specific installed .NET Framework KB depends on the version already present on the device.

Product Information

Vendor: Microsoft

Product: .NET Framework

Product type: Other

Platform: Windows

Version: KB5120747

Vendor release date: Aug 11, 2026

Original release notes: View on vendor site

Published on updatealert.io: Aug 19, 2026

Description: Developer runtime and framework for building and running Windows applications.

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