January 17, 2026—KB5077793 (OS Build 26100.32234) Out-of-band

January 17, 2026—KB5077793 OS Build 26100.32234 Out-of-band ​​​​This out-of-band update for Windows Server 2025 KB5077793 is cumulative. It includes updates from previous security releases, along with an additional fix. To learn more about differences between security updates, optional non-securi...