cumulative updates

Winsage
October 12, 2026
Windows 11 version 24H2 for Home and Pro systems will stop receiving security updates on October 13, 2026. After this date, these editions will not receive any updates or technical support, although they will still boot. Windows 11 Enterprise, Education, IoT Enterprise, and Enterprise multi-session editions will continue to receive support until October 12, 2027. Organizations are advised to verify their systems' versions and editions, especially for those without endpoint management systems. Windows 11 25H2 and 26H2 are available as upgrade options, with 25H2 supported until October 12, 2027, and 26H2 supported until October 10, 2028, for Home and Pro editions. The rollout of 26H2 will be phased, and safeguard holds may be implemented if compatibility issues are detected. Unmanaged Home and Pro devices on 24H2 will automatically receive 25H2, while managed devices may require IT intervention. Regular monitoring and proactive management of Windows versions are necessary to ensure compliance and avoid future deadlines.
Winsage
September 28, 2026
Windows 11 26H2 is expected to begin public rollout around the week of September 28 or early October. Microsoft has released evaluation ISOs for enterprise users to assess compatibility before broader deployment. The release of these ISOs indicates that the public rollout is imminent. Windows 11 26H2 is built on the same platform as versions 24H2 and 25H2, which allows for a smoother upgrade experience. Support for Windows 11 25H2 ends on October 12, 2027, and for 24H2 even sooner, prompting the introduction of 26H2 to provide users with a new support window. Windows 11 26H2 will be available as an optional feature update and will take about five minutes to install for users with up-to-date systems running 24H2 or 25H2. Eligibility for the update includes any PC currently running Windows 11 24H2 or 25H2. The rollout is expected to occur on a Tuesday, with potential dates of September 29 or October 6. Not all eligible PCs will receive the update simultaneously, and users can manually check for updates or download ISOs as needed.
Winsage
September 25, 2026
Microsoft has released the KB5124010 September 2026 non-security preview update for Windows 11 versions 24H2 and 25H2, introducing 46 enhancements, including improvements to Bluetooth functionality and the ability to remap the Copilot key. This update is optional and focuses on quality improvements without security fixes. Key features include support for Emoji 17.0, a new accessibility setting for maximizing app windows, and a recovery remote management plug-in. Bluetooth issues have been addressed, including crashes related to audio streaming and microphone compatibility. Users can remap the Copilot key to function as the Right Ctrl or Context Menu key. The update elevates Windows 11 25H2 and 24H2 devices to builds 26200.9550 and 26100.9550, respectively. Other highlights include the ability to use slideshow wallpapers across multiple desktops, enhanced gesture controls for precision touchpads, and a Camera roll backup feature for OneDrive. Microsoft has fixed a known issue with the File History backup feature and removed the PC-to-PC Migration tool, recommending Windows Backup instead. KB5124010 is the last preview update for Windows 11 24H2, which will reach end of support in October 2026.
Winsage
September 24, 2026
Microsoft has informed IT administrators about potential connection challenges with the Always On VPN after the September 2026 Windows 11 security updates. Users may face difficulties connecting to their organization's network, particularly if the VPN is set to automatically attempt an alternative connection method upon failure. Symptoms include connections remaining in a 'Connecting' state or displaying the error message: 'The specified port is already in use.' Affected versions include Windows 11, version 26H1 (KB5124012), version 25H2 (KB5124008), and version 24H2 (KB5124008). A temporary workaround involves adjusting the Always On VPN profile from automatic protocol selection to a single protocol (SSTP or IKEv2). Microsoft is also addressing various other issues related to Hyper-V, Remote Desktop Services, USB audio, and the File History backup feature.
Winsage
September 11, 2026
Microsoft addressed a significant bug that affected the launch of Teams and Outlook on ARM-based Windows devices after updates from the August 2026 Patch Tuesday. The issue primarily impacted users of devices like the Surface Pro 11 and Surface Laptop 7 running Windows 11 24H2 or later, who had not installed necessary updates from the Microsoft Store. The bug caused Teams and Outlook to fail to launch or close unexpectedly following the installation of security updates released on or after August 11, 2026 (KB5121003). Classic versions of Outlook and other applications were not affected. A temporary workaround was suggested, involving updating the Auto Super Resolution Package. The bug was resolved through cumulative updates released on September 8, 2026 (KB5124012), and users were urged to install the latest updates for improvements and issue resolutions. Additionally, Microsoft acknowledged other issues related to updates from August, including disruptions in printing and PDF exporting due to .NET Framework updates, gaming problems from peripherals with RGB lighting, and alerts regarding Microsoft Defender Antivirus being disabled. They also fixed issues related to the loss of custom mouse settings and desktop configurations following the installation of the KB5120998 August 2026 preview update.
Winsage
September 9, 2026
On September 8, 2026, Microsoft disclosed a security vulnerability identified as CVE-2026-69449, related to a heap-based buffer overflow in the Windows BitLocker component, allowing authorized attackers to execute code on compromised machines. The vulnerability is classified as CWE-122, and is assessed as “Exploitation Less Likely.” It affects Windows 10, Windows 11, and Windows Server versions from 2012 to 2025. The fixes are included in cumulative updates KB5124008, KB5124012, KB5122878, and KB5122871. No public disclosure or observed exploitation occurred before the patch's release. The flaw allows for remote code execution through in-network attacks, primarily posing a risk to insiders. Affected systems include various versions of Windows 10, Windows 11, and Windows Server, applicable to both x64 and ARM64 architectures. Administrators should verify installed build numbers to ensure updates have been applied. The advisory does not specify which BitLocker code path is affected or the nature of the input that reaches the vulnerable buffer.
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