Cu23 security update. .
Cu23 security update. These fixes will also be included in later cumulative updates for Exchange Server 2016. Although we are not aware of any active exploits in the wild, our recommendation is to immediately install these updates to protect your environment. Sep 2, 2025 · Learn the best approach to Install Security Updates for Exchange Server 2016 (CU23 SU8). It includes fixes for nonsecurity issues and all previously released fixes for security and nonsecurity issues. Re-run the Health Checker after you install an update to see if any further actions are needed. Oct 10, 2023 · Microsoft has released Security Updates (SUs) for vulnerabilities found in: Exchange Server 2019 Exchange Server 2016 SUs are available for the following specific versions of Exchange Server: Exchange Server 2019 CU12 and CU13 Exchange Server 2016 CU23 The October 2023 SUs address vulnerabilities responsibly reported to Microsoft by security partners and found through Microsoft’s internal . The dates and times for these files are listed in Coordinated Universal Time (UTC). 1 day ago · Hash tables for Exchange Server 2016 CU23 SU19 (KB5066367) - Download the hashes now Exchange Server file information The English (United States) version of this update installs files that have the attributes that are listed in the following tables. 1 day ago · Patch Tuesday Release Notes from Microsoft for September 2025 on the Patch Tuesday Blog. May 29, 2025 · Hotfix update for Microsoft Exchange Server 2016 CU23 HU16 was released on May 29, 2025. If you encounter errors during or after installation of Exchange Server, run the SetupAssist script. Aug 12, 2025 · Use the Exchange Update Wizard to choose your current CU and your target CU to get directions. Jul 15, 2024 · Cumulative Update 23 for Exchange Server 2016 resolves issues that were found in Exchange Server 2016 since the software was released. This update rollup is highly recommended for all Exchange Server 2016 customers. Apr 18, 2025 · Hotfix update for Microsoft Exchange Server 2016 CU23 was released on April 18, 2025. The vulnerabilities addressed in these Security Updates f… 1 day ago · Microsoft today published October 2025 Security Updates for Exchange Server — a targeted release that patches multiple vulnerabilities, finalizes the last publicly available security rollups for Exchange Server 2016 and 2019, and introduces an operational change that blocks exporting the 1 day ago · Exchange Server 2016 CU23 The October 2025 SUs address vulnerabilities responsibly reported to Microsoft by security partners and found through Microsoft’s internal processes. Aug 12, 2025 · Security Update for Exchange Server 2016 CU23 SU17 (KB5063223) Security Update for Exchange Server 2016 CU23 SU17 (KB5063223) Important! Selecting a language below will dynamically change the complete page content to that language. These fixes and features will also be included in later cumulative updates for Exchange Server 2019. Nov 27, 2024 · Please see the KB article for more information about security content in this update. It includes fixes for non-security issues and introduces new features. 1 day ago · The Exchange product group released the October 2025 Hotfix Updates for Exchange Server SE, Exchange Server 2019, and Exchange Server 2016. Cumulative Update 23 for Exchange Server 2016 (KB5011155) Cumulative Update 23 for Microsoft Exchange Server 2016 was released on April 20, 2022.
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