Microsoft has warned that its September 2026 security updates may break Always On VPN connections on some Windows 11 systems. The company said the update can interfere with established VPN links after installation, potentially leaving affected users without remote connectivity.
The warning comes from BleepingComputer's reporting on a Microsoft advisory, and no other sources were provided for comparison. The exact conditions that trigger the problem are not described in the report, and Microsoft has not yet confirmed a patch or workaround.
Given that only one outlet has covered this so far, organizations relying on Always On VPN should treat the warning as preliminary and monitor Microsoft's support channels for further guidance.