KB5120240: Overview with user sentiment and feedback
Last Updated September 24, 2026
Probability of successful installation and continued operation of the machine
Overview
KB5120240 is a cumulative security and quality update for Windows 11 version 23H2, released on August 11, 2026 (OS Build 22631.7517). This update incorporates the latest security fixes and improvements, along with non-security updates from the previous month's optional preview release. It applies to all editions of Windows 11 version 23H2.
General Purpose
- Connectivity: Refreshed COSA profile for SolNet-Mobile to support latest mobile operator settings
- Device Management: Enhanced reliability for MDM-managed devices when MDM certificates expire
- File History: Improved reliability of File History backups to SMB network shares with better scheduled backup access
- Secure Boot: Added high-confidence device targeting data to expand coverage for automatic Secure Boot certificate deployment
- Emoji Panel: Updated emoji panel (Windows key + period) to support GIPHY following deprecation of Google's Tenor API
- Security Updates: Contains security fixes and quality improvements from the previous cumulative update (KB5099414)
General Sentiment
No community sentiment data is available from the provided sources, as the content consists primarily of the official Microsoft support documentation. The update appears to be a routine monthly security and quality rollup with targeted improvements to connectivity, device management, and user interface features. Microsoft explicitly states no known issues are currently identified with this update, suggesting a stable release. The inclusion of Secure Boot certificate updates addresses an important infrastructure concern with certificates expiring in June 2026.
Known Issues
Disclaimer: We take measures to ensure that AI-generated content is of the highest possible quality, but we cannot guarantee its accuracy and recommend that users do their own independent research. Generated on 2026-09-24 01:42 AM
