Microsoft has released an out-of-band update, KB5063060, for Windows 11 version 24H2, elevating the OS build to 26100.4351. This update addresses a critical security vulnerability that could allow remote code execution if exploited. Given the severity, Microsoft recommends immediate installation of this update to safeguard systems against potential threats.
Key Highlights of KB5063060:
- Security Fixes: The primary focus of this update is to patch a vulnerability that, if left unaddressed, could enable attackers to execute arbitrary code remotely.
- No New Features: This release does not introduce any new features or non-security improvements.
To apply this update, navigate to Settings > Windows Update and select Check for updates. The update should appear as available for download and installation. Alternatively, the standalone package can be obtained from the Microsoft Update Catalog.
Known Issues:
As of this release, there are no reported issues associated with KB5063060. Users are encouraged to monitor the Windows release health dashboard for any updates or emerging concerns.
Context and Analysis:
Out-of-band updates are typically reserved for addressing critical vulnerabilities that cannot wait for the regular Patch Tuesday schedule. The prompt release of KB5063060 underscores the potential risk posed by the identified security flaw.
While the update is crucial for maintaining system security, the absence of new features means users will not experience any changes in functionality or user interface. This focus on security over feature enhancements is a common approach in out-of-band updates, prioritizing the immediate protection of users over the introduction of new capabilities.
It's worth noting that previous updates, such as the March 2025 Patch Tuesday release (KB5053598), included both security improvements and new features like multi-app camera support and enhancements to Windows Spotlight. In contrast, KB5063060 is solely dedicated to addressing the critical security issue at hand.
Recommendations:
- Immediate Update: Due to the severity of the vulnerability addressed, users should install KB5063060 without delay to ensure their systems are protected.
- Regular Monitoring: Stay informed about future updates and potential issues by regularly checking the Windows release health dashboard and subscribing to relevant Microsoft notifications.
- Backup Systems: Before applying any update, it's advisable to back up important data to prevent potential data loss in case of unforeseen issues during the update process.
Source: Microsoft Support June 11, 2025—KB5063060 (OS Build 26100.4351) Out-of-band - Microsoft Support
