We do not perform any vulnerability testing against this version of Exchange anymore. Exchange Server 2013 is now out of support and will not receive any further security updates. Where are the SUs for Exchange Server 2013 and Exchange Server 2019 CU11? Changing the permissions for Public Folders by using an Outlook client will fail with the following.“Object '' couldn't be found on ''" error when trying to uninstall.There are no known issues with this release.
If something does not work properly after updates, see Repair failed installations of Exchange Cumulative and Security updates.
Use the Exchange Update Wizard to choose your current CU and your target CU to get directions. The following update paths are available: More details about specific CVEs can be found in the Security Update Guide (filter on Exchange Server under Product Family). Exchange Online customers are already protected from the vulnerabilities addressed in these SUs and do not need to take any action other than updating Exchange servers in their environment.
These vulnerabilities affect Exchange Server.
Although we are not aware of any active exploits in the wild, our recommendation is to install these updates immediately to protect your environment. The June 2023 SUs address vulnerabilities responsibly reported to Microsoft by security partners and found through Microsoft’s internal processes. SUs are available for the following specific versions of Exchange Server: exe package, as well as the original update packages (.msp files), which can be downloaded from the Microsoft Update Catalog. SUs are available in a self-extracting auto-elevating. Microsoft has released Security Updates (SUs) for vulnerabilities found in:
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