October 2026 Exchange Server Security Updates (KB5128895): The Last Ones for Exchange 2016 and 2019, and Two Flaws Rated More Likely to Be Exploited Microsoft released the October 2026 Exchange security updates on October 13. Build and KB for each version, the six CVEs, how to read your build, and why this is the last update for Exchange 2016 and 2019. Oct 24, 2026 7 min read Exchange
