Skip to the content
The Update Bureau
Windows 10 1809 Windows 10 1809 Security update
Patch Tuesday

KB5065428

KB5065428: Cumulative update for Windows 10, version 1809, September 2025. Critical Hyper-V flaws patched; Chinese IME boxes fixed

In short

Fixes 42 security vulnerabilities, including 7 rated Critical, and fixes empty boxes in the Chinese Simplified IME. It also narrows unexpected UAC prompts during some MSI repairs.

Does it affect you? Applies to: Devices running Windows 10 version 1809: Windows 10 Enterprise LTSC 2019, Windows 10 IoT Enterprise LTSC 2019, or Windows 10 IoT Core LTSC.

Build
17763.7792
Security
42 fixed · 7 critical
Restart
Required

Microsoft publishes separate notes for this KB for Windows Server.

What changes

Fixes 2 changes

Input and Composition

For: Users of the Chinese Simplified IME

  • Chinese Simplified IME extended characters that showed as empty boxes display correctly.1

App compatibility (known issue)

For: Non-admin users and IT administrators

  • The scope of unexpected UAC prompts for non-admin users during certain MSI installer actions is reduced. IT administrators can disable prompts for specific apps by adding them to an allowlist.2
    The issue could prevent non-admin users from running apps that perform MSI repairs, including Office Professional Plus 2010 and applications from Autodesk such as AutoCAD. The fix does not state that all prompts are eliminated.

Improvement 1 change

Servicing stack

  • The component that installs Windows updates receives quality improvements intended to help the update process.3
    The combined package includes servicing stack update KB5065765, build 17763.7781.

New feature 1 change

File Server

  • IT administrators can check whether devices or software might be incompatible with SMB Server signing and SMB Server EPA before deploying hardening measures.4
    Enables auditing SMB client compatibility for SMB Server signing and SMB Server EPA.

Technical details

Data sheet · Security · Downloads · Components Click to collapse or expand

Data sheet

Released
2025-09-09
Classification
Security Updates
Type
Cumulative update
Restart
Required
Replaces
KB5066187, KB5063877, KB5062557, KB5060531
+6 earlier KB5061978, KB5058392, KB5059091, KB5058922, KB5050008, KB5037425
Replaced by
KB5066586
VersionBuildChannel
1809 17763.7792 General availability

Security

42 vulnerabilities fixed
7 critical 34 important 1 moderate
VulnerabilitySeverityCVSS
CVE-2025-54918
Windows NTLM Elevation of Privilege Vulnerability
 Critical 8.8
CVE-2025-53800
Windows Graphics Component Elevation of Privilege Vulnerability
 Critical 7.8
CVE-2025-55224
Windows Hyper-V Remote Code Execution Vulnerability
 Critical 7.8
CVE-2025-55236
Graphics Kernel Remote Code Execution Vulnerability
 Critical 7.3
CVE-2025-48807
Windows Hyper-V Remote Code Execution Vulnerability
 Critical 6.7
CVE-2025-55226
Graphics Kernel Remote Code Execution Vulnerability
 Critical 6.7
CVE-2025-53799
Windows Imaging Component Information Disclosure Vulnerability
 Critical 5.5
CVE-2025-55234
Windows SMB Elevation of Privilege Vulnerability
 Important 8.8

The table lists the 8 exploited, publicly disclosed or critical vulnerabilities. See all 42 vulnerabilities →

Updated components

631 files changed since the previous update for the same versions.

Top changed componentsFiles
Security and sign-in18
Networking16
Graphics and display14
Secure Boot11
Remote Desktop10
Kernel9
Search8
File Explorer and shell6
Printing4
Storage and file systems4
Hyper-V and virtualization3
Settings2

Sources

Updated
Cited passages from Microsoft's official notes (4)
  1. 1. Fixed: An issue with the Chinese Simplified Input Method Editor (IME). Some extended characters were showing as empty boxes. support.microsoft.com
  2. 2. This fix reduces the scope for requiring UAC prompts for MSI repairs and enables IT admins to disable UAC prompts for specific apps by adding them to an allowlist. support.microsoft.com
  3. 3. This update makes quality improvements to the servicing stack, which is the component that installs Windows updates. support.microsoft.com
  4. 4. This update enables auditing SMB client compatibility for SMB Server signing as well as SMB Server EPA. support.microsoft.com
Checked automatically: 8 of 8 checks passed, 4 quoted passages · compared with Microsoft's page on Oct 20, 2026
  • Quotes found in the official pages: passed
  • Numbers found in the sources: passed
  • Vulnerabilities from the dossier only: passed
  • Links to allowed domains only: passed
  • Every official change covered: passed
  • Readable plain text: passed
  • Changes confirmed by the file list: passed
  • Sources agree: passed

A second AI read the text against the sources: correctness 5/5, clarity 4/5, completeness 4/5. How we work

Published by The Update Bureau. Written with AI from Microsoft's own documents, checked by rules and a second AI. How we work · Report a mistake