Microsoft September Windows Updates Break Always On VPN

Microsoft has issued a warning that its September 2026 security updates may also break Always On VPN connections on some Windows 11 systems. The issue, detailed in a support document released on September 26, 2026, affects devices that have installed the cumulative updates released on September 12, 2026. Specifically, the problem is observed on Windows 11, version 23H2, and Windows 11, version 22H2. The company has acknowledged that after installing these updates, users might encounter difficulties establishing or maintaining Always On VPN connections. Always On VPN is a feature designed to provide a persistent VPN connection for devices, ensuring continuous security and access to network resources without user intervention. This is particularly crucial for organizations that rely on remote access for their employees. The specific cumulative updates identified as causing this disruption are KB5030219 for Windows 11, version 23H2, and KB5030214 for Windows 11, version 22H2. Microsoft has stated that it is actively working on a resolution and plans to provide an update in an upcoming release, though a specific timeline has not yet been provided. In the interim, the company has not offered a direct workaround for users experiencing the problem. This incident highlights the potential for broad security updates to introduce unintended consequences for critical network infrastructure features. Always On VPN is a key component for many enterprises managing remote workforces, and its disruption can lead to significant productivity losses and security concerns if not promptly addressed. The company's transparency in acknowledging the issue and committing to a fix is a standard practice for addressing such critical bugs. Users experiencing this issue are advised to monitor Microsoft's official support channels for further announcements regarding the fix. The affected Windows 11 versions, 23H2 and 22H2, are the most recent feature updates for the operating system, indicating a widespread potential impact among users who have kept their systems up-to-date with the latest security patches. The September 2026 security updates are part of Microsoft's regular Patch Tuesday cycle, which aims to address various vulnerabilities and security flaws. However, this particular update has inadvertently created a new problem for a specific networking feature. The company's support document provides the knowledge base article numbers for the problematic updates, allowing users to identify if they have installed the affected patches. The lack of an immediate workaround means that organizations and individuals relying on Always On VPN may need to temporarily disable the feature or seek alternative VPN solutions until Microsoft releases a fix. This situation underscores the importance of thorough testing of cumulative updates, especially those that impact core networking and security functionalities.