Microsoft finally fixes VPN issues caused by September updates
Summary
Microsoft has released a fix for an issue that caused Always On VPN connection failures after installing the September 2026 Windows 11 security updates. The problem affected specific configurations and is now resolved.
IFF Assessment
FOE
This is bad news for defenders as it highlights a vulnerability in a critical infrastructure component (VPN) that could have been exploited or disrupted.
Defender Context
This incident underscores the importance of thorough testing of security updates, especially those affecting network connectivity and VPN services. Defenders should remain vigilant for post-patch issues and have rollback or remediation plans in place. Monitoring VPN health and connectivity is crucial to identify and address such problems promptly.