Windows 10 22H2 KB5120249
Windows 10 Build 19045.7663 (KB5120249) is the August 2026 cumulative security update for Windows 10 version 22H2. The release delivers Microsoft's latest security fixes and cumulative quality improvements. Because standard Windows 10 22H2 support has ended, continued security servicing depends on applicable Extended Security Updates (ESU) or supported editions.
- Includes the August 2026 Microsoft security updates for Windows 10.
- Addresses security vulnerabilities across supported Windows components as part of Microsoft's monthly security servicing.
- Includes cumulative security and quality fixes from previous Windows 10 updates.
- Deployment is recommended for eligible Windows 10 ESU and supported LTSC environments.
What's new
Windows 10 Build 19045.7663 (KB5120249) is the August 2026 cumulative security update for Windows 10 version 22H2.
What's new- Includes the latest Microsoft security fixes released as part of the August 2026 security update cycle.
- Provides cumulative quality and reliability improvements for Windows 10.
- Includes previously released fixes because Windows cumulative security updates are cumulative.
- Includes servicing improvements designed to maintain the reliability and security of supported Windows 10 installations.
Windows 10 version 22H2 reached the end of standard support on October 14, 2025. Security updates after this date are available only to eligible devices through the Extended Security Updates (ESU) program and other supported servicing scenarios.
RecommendationOrganizations with eligible Windows 10 systems should deploy KB5120249 to maintain protection against known security vulnerabilities. Systems that are not covered by ESU or another supported servicing channel should be prioritized for migration to a supported Windows version.
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