Microsoft fixes VPN issues caused by September Windows updates
Summary
Microsoft has released a fix for a known issue that caused problems with Always On VPN connections after users installed the September 2026 Windows 11 security updates. The update resolves the connectivity problems that arose from the previous patches.
IFF Assessment
FOE
This article highlights a security update that, when released, caused a negative impact on VPN functionality, which is a concern for defenders.
Defender Context
This incident underscores the importance of thorough testing of security updates before widespread deployment, as even patches designed to improve security can inadvertently disrupt critical infrastructure like VPNs. Defenders should monitor for post-patch issues and be prepared to roll back or apply hotfixes quickly.