GoKawiilMicrosoft fixes Always On VPN failures from September Windows 11 update
Microsoft has resolved an Always On VPN bug that caused connection failures after the September 2026 Windows 11 security update, confirming the fix is included in this month's KB5127936 preview update. The company had earlier mistakenly claimed the issue was resolved in October's cumulative update. Affected users saw VPN connections stuck in a 'Connecting' state or fail with a 'port already in use' error when automatic protocol selection or fallback was configured.
GoKawiil's interpretation of the reporting above, not reported fact.
The repeated false claim of a fix suggests Microsoft's patch validation process missed the recurrence, which could erode IT administrators' trust in its update testing. Organizations relying on Always On VPN for remote access may have faced weeks of connectivity disruption, prompting many to adopt the manual workaround of fixing a single tunneling protocol rather than wait for a permanent patch.
- Microsoft confirmed a fix for Always On VPN failures via the KB5127936 preview update.
- The bug stemmed from September 2026 security updates affecting automatic protocol selection with IKEv2/SSTP.
- A temporary workaround lets admins force a single protocol (SSTP or IKEv2) until next month's official patch.
Source: bleepingcomputer.com, 2026-10-30
Published there as: “Microsoft finally fixes VPN issues caused by September updates”
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