cyber.hendryadrian.com
Security News · bleepingcomputer.com

Microsoft Releases Windows 10 KB5120249 August 2026 Security Update

· Original article ↗

Summary

Microsoft’s mandatory KB5120249 update for Windows 10 versions 22H2 and 21H2 includes August 2026 security fixes, resolves an SMB File History backup issue, and expands rollout of new Secure Boot certificates.

Key points

  • KB5120249 is a mandatory Extended Security Updates release for Windows 10 versions 22H2 and 21H2.
  • The update includes the August 2026 Patch Tuesday security fixes; the article does not specify the vulnerabilities addressed.
  • It fixes a File History issue that could prevent scheduled backups to SMB network shares.
  • Additional device-targeting data expands the rollout of new Secure Boot certificates to eligible devices.
  • After installation, Windows 10 builds become 19045.7663 and 19044.7663.

Article Details

Event Type
Microsoft released the mandatory Windows 10 KB5120249 Extended Security Update for versions 22H2 and 21H2, including the August 2026 Patch Tuesday updates.
Impact
The update addresses security vulnerabilities and bugs, fixes a File History backup failure affecting SMB network shares, and expands eligibility for automatic deployment of new Secure Boot certificates. After installation, systems update to builds 19045.7663 or 19044.7663.

Vendors

MicrosoftMicrosoft has released the Windows 10 KB5120249 ESU for versions 22H2 and 21H2 to address security vulnerabilities, fix bugs, and deliver the August 2026 Patch Tuesday updates.

Products

Secure BootThe update resolves a File History backup issue over SMB and expands the rollout of new Secure Boot certificates.Windows 10Microsoft has released the Windows 10 KB5120249 ESU for versions 22H2 and 21H2 to address security vulnerabilities, fix bugs, and deliver the August 2026 Patch Tuesday updates.

Related Articles