Summary
- The September 2026 Microsoft security update Scan Cab has been delayed and is not yet available.
- This notice only affects environments that use Scan Cab to check Microsoft update compliance.
- IT administrators should monitor Microsoft communications for the release update.
- No configuration change or immediate admin action is required from this notice alone.
Microsoft 365 Message Center ID: MC1469328
Primary Service: Windows
Admin Impact: Low
User Impact: Low
Release Start: 08 Sept 2026
Release End: 08 Sept 2026
Last Modified: September 9, 2026
Category: Message Center
Tags: New feature
Status: Launched
Products & Platforms: Windows
History
9/8/2026 Item Added to Message Center
Microsoft Message
Note: This notice only affects environments where Scan Cab is used to check for Microsoft update compliance.
The Scan Cab for the September 2026 Microsoft security updates is currently delayed and has not yet been released.
Rollout schedule
We expect to release it as soon as possible and will provide an update as more information becomes available. Thank you for your patience.
Who is affected
IT administrators who rely on Scan Cab to check for update compliance can monitor our communications for updates.
What will happen
Updates on the availability of this month’s Scan Cab will be communicated as new information becomes available.
Additional information
- Learn more about the Scan Cab process: Announcing a smaller WSUS Scan Cab
- Use Windows Update Agent (WUA) to scan computers for security updates without connecting to Windows Update: Using WUA to Scan for Updates Offline – Win32 apps
- Documentation on the Catalog Site used to import updates and drivers: WSUS and the Catalog Site