Microsoft Admits Always On VPN Bug Persists
The tech giant reverted the status of a Windows 11 VPN connectivity issue back to mitigated after a failed security fix.
Updated on Oct. 20, 2026 in Cybersecurity
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Microsoft confirmed that its October security update failed to resolve an ongoing Always On VPN bug affecting Windows 11 users. The company has officially reverted the status of the issue from resolved to mitigated.
Why it matters
The persistence of this bug impacts enterprise connectivity for organizations relying on Windows 11 infrastructure. Users continue to face connection failures that require manual administrative intervention to bypass.
The bug affects Windows 11 versions 24H2 through 26H2 and triggers error messages stating that a specified port is already in use. It occurs when VPNs are set to automatic protocol selection, preventing successful connections.
The players
Microsoft
A multinational technology corporation that develops the Windows operating system and manages security updates for global enterprise and consumer users.
The details
The issue stems from a September 2026 update that disrupted VPN functionality. Administrators can currently maintain connections by manually configuring their VPN settings to use a single protocol instead of the default automatic selection method.
Timeline
September 2026: The Windows security update inadvertently broke Always On VPN functionality.
October 13, 2026: Microsoft incorrectly marked the VPN bug as resolved.
October 20, 2026: Microsoft acknowledged that the update did not actually fix the bug.
The Tech Race
This incident highlights a lapse in the standard testing procedures established by the Windows Insider Program. As Microsoft shifts toward more frequent updates, the reliance on automated deployment methods risks introducing regressive bugs that complicate enterprise IT management.
Business users experiencing VPN connection failures should work with their IT administrators to lock in a single protocol configuration. This manual adjustment will bypass the automatic selection error and restore connectivity while waiting for the permanent patch.
The takeaway
Reliability in network security tools is critical for remote business operations and enterprise stability. Always verify that your organization's IT department has implemented the recommended manual protocol workaround to maintain consistent VPN access.
What happens next
Microsoft plans to include a formal resolution for the Always On VPN bug in a forthcoming update scheduled for release in the coming weeks.
Further reading
For additional context on enterprise software vulnerabilities, visit the Cybersecurity section.
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