On May 27, Microsoft released an out-of-band update, KB5061977, for Windows 11 version 24H2, elevating the operating system build to 26100.4066. This emergency patch addresses a security vulnerability currently being exploited, likely related to remote code execution or privilege escalation. The update is available through Windows Update, Windows Update for Business, WSUS, and the Microsoft Update Catalog. Organizations are urged to prioritize its installation, especially on publicly accessible or critical systems. The update focuses on security and reliability improvements, with no new features introduced. The issuance of this update outside regular maintenance windows presents challenges for IT administrators, emphasizing the need for proactive patch management strategies.