Upgrade straight to the latest CU (cu19) .
https://support.microsoft.com/en-us/help/4588884/cumulative-update-19-for-exchange-server-2016
Your CU is no longer supported and very old and the security updates are in CU19.
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My exchange version is exchange 2016 cu7
Received notification, need to update KB CVE-2020-17117, CVE-2020-17132, CVE-2020-17141, CVE-2020-17142, CVE-2020-17143,
But Microsoft only released msp for exchange 2016 cu17 & cu18,
I want to know if there is a need to update the version before exchange 2016 cu 17?
or I need to upgrade exchange 2016 cu7 to exchange 2016 cu17 first, and then update the KB
Upgrade straight to the latest CU (cu19) .
https://support.microsoft.com/en-us/help/4588884/cumulative-update-19-for-exchange-server-2016
Your CU is no longer supported and very old and the security updates are in CU19.