Microsoft fixes Excel paste bug from September update

A September security update broke copying and pasting in Excel. Microsoft has now released a partial fix, though many users may not have noticed the problem.

Sep 21, 2026

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Microsoft fixes Excel paste bug from September update

A September security update broke copying and pasting in Excel. Microsoft has now released a partial fix, though many users may not have noticed the problem.

In brief

A September security update broke copying and pasting in Excel. Microsoft has now released a partial fix, though many users may not have noticed the problem. Microsoft released a hotfix for an Excel paste bug introduced by a September eighth twenty twenty-six security update, though the fix only fully applies to Excel…

Excel paste breaks after security update

A September eighth twenty twenty-six security update to Microsoft Excel introduced a bug that broke copying and pasting across the spreadsheet software.

The paste fails silently

When users tried to paste content, the source remained selected and the destination stayed unmodified. No error message or sound alerted them to the failure.

“the paste operation might fail silently”

Multiple Excel versions affected

The bug hit Microsoft Excel two thousand twenty-four, two thousand twenty-one, two thousand nineteen, and two thousand sixteen, plus Excel Online in Office Online Server.

Microsoft releases partial fix

Microsoft released a hotfix just days after the bug appeared. Office LTSC two thousand twenty-one and two thousand twenty-four are now fully fixed, but two thousand nineteen and two thousand sixteen only have mitigations.

Simple workaround available now

Users can work around the problem by selecting Paste Special from the Home tab instead of using regular paste. Conditional formatting is apparently causing the issue.

The main idea

Microsoft released a hotfix for an Excel paste bug introduced by a September eighth twenty twenty-six security update, though the fix only fully applies to Excel two thousand sixteen.

Read the original on TechRadar

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