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Out of Band Cumulative Updates Question
I installed March 2026 Cumulative Update on a new server instead of April due to some RC4 changes to test something. I noticed that after the update installed in the event viewer it thinks the June 2026 update was installed. I don't see the June update under installed updates but shows up in update history. The build version of the server matches with the March 2026 update. Is this a weird side effect of installing a superceded update? I'm having trouble understanding what is going on.
1 Reply
Hi, Windows cumulative updates are generally superseding, which means a newer cumulative update should include fixes from earlier ones unless Microsoft documents an exception. For RC4-specific testing, I would compare the exact KB release notes and test on a snapshot or non-production server. If April or later updates changed the same behavior again, your March test result may not represent the final patched state.
