June 9, 2026—KB5094126 (OS Builds 26200.8655 and 26100.8655)
Highlights
This security update includes quality improvements. Below is a summary of the key issues that this update addresses when you install this KB.
This update addresses security issues for your Windows operating system.
Known issues in this update
Symptoms
Microsoft has received reports of an issue in which certain third-party applications might be unable to launch Microsoft Office applications or open documents after installing the Windows updates released on or after June 9, 2026. This issue affects certain third-party applications that use OLE automationto interact with Microsoft Office applications. Affected Microsoft Office applications might include Word, Excel, PowerPoint, Access, and other Microsoft Office applications when launched from within the affected third-party application.
Workaround
A resolution is in progress and will be included in a future Windows update. More information will be shared when it becomes available.
To work around this issue, open the application or document directly instead of launching it from the affected third-party application.
Symptoms
After you install Windows updates released on June 9, 2026, the confirmation dialog might display the internal Recycle Bin file name (for example, $Rxxxxx.ext) instead of the original file name when you permanently delete a single item. In Recycle Bin, the item still appears with its original name.
Workaround
This issue is addressed inKB5095093.
How to get this update
Before you install this update
Microsoft combines the latest servicing stack update (SSU) for your operating system with the latest cumulative update (LCU).