Microsoft has resolved a known issue that caused copy-and-paste failures in Excel after the September 2026 security updates. The problem affected Office users who installed those updates, breaking a core workflow in the spreadsheet application.
The fix is now being delivered to all Office users, according to the company. Microsoft did not indicate that users need to take additional steps beyond installing the latest update. The source does not specify whether the fix is automatic or requires manual installation, but it confirms the issue is addressed for the full Office user base.