Microsoft issues a fix for Windows 11 Always On VPN failures
Technology · First reported 30 Oct, 11:20 · Updated 16:22
Microsoft’s KB5127936 optional preview update fixes Always On VPN connection failures linked to September 2026 security updates on Windows 11 25H2 and 26H2. Devices that do not install the preview remain affected until the November cumulative update, while administrators can temporarily switch VPN profiles from automatic protocol selection to a single protocol.
- The failures affected Windows 11 systems whose Always On VPN profiles used automatic protocol selection with IKEv2 and SSTP; connections could stall or fail.
- The KB5127936 optional preview update provides the fix for Windows 11 25H2 and 26H2; systems that skip it remain affected until the November cumulative update.
- As a temporary measure, administrators can configure a profile to use SSTP only or IKEv2 only, then restore the profile after installing the fixed cumulative update.
Summary written by Lux AI from 2 articles
Key facts
- Fix
- KB5127936 optional preview update
- Affected versions
- Windows 11 25H2 and 26H2
- Cause
- September 2026 security updates
- Temporary mitigation
- Configure the profile for SSTP only or IKEv2 only
- Fallback timing
- November cumulative update for devices that skip the preview
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