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Windows 10 1809 Windows 10 1809 Security update
Patch Tuesday

KB5062557

KB5062557: Cumulative update for Windows 10, version 1809, July 2025. NEGOEX remote-code flaw patched; language-pack cleanup fixed

In short

The update fixes 75 security vulnerabilities, including five critical flaws, and resolves an issue that wasted storage and slowed updates. It also improves Windows update servicing.

Does it affect you? Applies to: Devices running Windows 10 Enterprise LTSC 2019, version 1809, on x86 or x64.

Build
17763.7558
Security
75 fixed · 5 critical
Restart
Required

Microsoft publishes separate notes for this KB for Windows Server.

What changes

Fix 1 change

Input and Composition

  • Unused language packs and Feature on Demand packages are removed completely, avoiding unnecessary storage use and longer update installations.1
    Fixes incomplete removal of unused language packs and Feature on Demand (FOD) packages.

Improvement 1 change

Servicing stack

  • The component that installs Windows updates receives quality improvements.2
    Includes servicing stack update KB5062800 (build 17763.7557).

Known issues

  1. Resolved Affects: Everyone Resolved by KB5063877

    Microsoft Changjie Input Method Editor

    The Microsoft Changjie IME for Traditional Chinese might fail to form or select words, ignore the spacebar, show incorrect output, or display its conversion candidate window incorrectly. This issue is resolved by updates released on and after August 12, 2025, including KB5063877.3

    Resolution Fixed in KB5063877

    Install KB5063877 (or a later cumulative update) on affected devices. No manual workaround is required after updating.

  2. Resolved Affects: Organizations and IT administrators Resolved by KB5063877

    Cluster Service

    On Windows Server 2019, the Cluster Service might repeatedly stop and restart when BitLocker is used with Cluster Shared Volumes. Nodes might fail to rejoin or enter quarantine, virtual machines might restart repeatedly, and Event ID 7031 errors might appear. This issue is resolved by Windows Server 2019 updates released on and after August 12, 2025, including KB5063877.4

    Resolution Fixed in KB5063877

    Install KB5063877 (or a later cumulative update) on affected devices. No manual workaround is required after updating.

Technical details

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

Data sheet

Released
2025-07-08
Classification
Security Updates
Type
Cumulative update
Restart
Required
Replaces
KB5060531, KB5061978, KB5058392, KB5059091
+3 earlier KB5058922, KB5050008, KB5037425
Replaced by
KB5063877
VersionBuildChannel
1809 17763.7558 General availability

Security

75 vulnerabilities fixed
5 critical 68 important 1 moderate 1 low
VulnerabilitySeverityCVSS
CVE-2025-47981
SPNEGO Extended Negotiation (NEGOEX) Security Mechanism Remote Code Execution Vulnerability
 Critical 9.8
CVE-2025-48822
Windows Hyper-V Discrete Device Assignment (DDA) Remote Code Execution Vulnerability
 Critical 8.6
CVE-2025-47980
Windows Imaging Component Information Disclosure Vulnerability
 Critical 6.2
CVE-2024-36350
AMD: CVE-2024-36350 Transient Scheduler Attack in Store Queue
 Critical 5.6
CVE-2024-36357
AMD: CVE-2024-36357 Transient Scheduler Attack in L1 Data Queue
 Critical 5.6
CVE-2024-21302
Windows Secure Kernel Mode Elevation of Privilege Vulnerability
 Important 6.7

The table lists the 6 exploited, publicly disclosed or critical vulnerabilities. See all 75 vulnerabilities →

Updated components

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

Top changed componentsFiles
Secure Boot19
Graphics and display14
Security and sign-in12
Hyper-V and virtualization10
Search8
Storage and file systems8
Windows Update8
Kernel7
Networking6
Remote Desktop6
Printing4
Audio3

Sources

Updated
Cited passages from Microsoft's official notes (4)
  1. 1. [Input and Composition] Fixed: An issue affecting the complete removal of unused language packs and Feature on Demand (FOD) packages. This issue led to unnecessary storage use and increased Windows update installation time. support.microsoft.com
  2. 2. This update makes quality improvements to the servicing stack, which is the component that installs Windows updates. support.microsoft.com
  3. 3. This issue is resolved by Windows updates released on and after August 12, 2025 ([KB5063877]). support.microsoft.com
  4. 4. This issue only occurs in configurations using BitLocker with Cluster Shared Volumes (CSV). 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 5/5. 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