Microsoft: September Windows updates break Always On VPN connections
September 2026 Windows updates break Always On VPN connections when automatic protocol selection is enabled.
Microsoft's September 2026 Windows security updates have broken Always On VPN connections for some users. The issue affects devices configured with automatic protocol selection (IKEv2/SSTP) and causes connections to fail or display port errors. Microsoft has provided a temporary workaround to switch to a single protocol and is developing a permanent fix.
- September 2026 Windows updates break Always On VPN connections.
- Issue occurs when VPN is set to automatic protocol selection.
- Affected versions include Windows 11 24H2, 25H2, and 26H1.
- Temporary fix is to switch to a single VPN protocol (IKEv2 or SSTP).
- Microsoft is working on a permanent solution.
From the original article
2 min read at bleepingcomputer.com
Microsoft warned that the September 2026 security updates may also break Always On VPN connections on some Windows 11 systems. [...]
By Sergiu Gatlan · bleepingcomputer.com
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