Microsoft's Latest Excel Security Patch Is Breaking Copy-Paste for Users

Key points

• Microsoft's KB5002914 security update for Excel, released this week, is breaking copy-and-paste and formula-drag features for some users.
• Affected users say Excel either freezes, crashes, or pastes nothing at all when they try basic spreadsheet actions.
• Removing the update restores normal function, but that leaves the underlying security fix unapplied.
• Microsoft has acknowledged user reports but has not yet published a formal advisory or fix at time of writing.

Microsoft Excel users are reporting that this week's Office security update, tracked as KB5002914, is breaking one of the most basic things a spreadsheet does: copying a cell and pasting it somewhere else.

The complaints, first surfaced by BleepingComputer, describe Excel freezing, throwing errors, or simply refusing to paste after the update installs. Dragging a formula down a column, the everyday shortcut that fills in a calculation across many rows, is also failing.

Rolling the update back fixes it. That is the workaround people are landing on in Microsoft's own community forums and on social media.

What exactly is going wrong?

Copy-paste inside Excel is broken for some users after the patch installs. That includes copying between cells in the same sheet, pasting from one workbook to another, and dragging the small square at the corner of a cell to extend a formula.

Users report a mix of symptoms. Some see Excel hang for several seconds. Others get a generic error message. A few say the paste appears to work but nothing actually lands in the target cell.

The bug seems to hit desktop versions of Excel on Windows after KB5002914 installs through the standard Office update channel. It is a security update, not a feature release, which is why most users will not have chosen to install it, it arrived automatically.

Who is affected?

Anyone running a desktop version of Excel that received KB5002914 this week is potentially affected. That covers a large slice of business users, since Office security patches are typically pushed to managed corporate machines within days of release.

Home users on Microsoft 365 subscriptions are also in scope. Web-based Excel, which runs in the browser, is not affected because it does not receive these desktop patches.

There is no indication the bug causes data loss. It is a functional break, not a corruption issue. Files opened in a patched Excel look fine, they just resist normal editing.

What should users do?

If Excel has become unusable since this week's Office update, the practical fix is to uninstall KB5002914 and restart. Microsoft's support pages document how to remove a specific Office update through the Control Panel on Windows.

There is a trade-off. KB5002914 is a security update, so pulling it means whatever vulnerability it patched is back on your machine until Microsoft ships a corrected version. For most home users the risk is low. For businesses handling regulated data, the call belongs with IT, not the individual.

A short summary of the situation:

Microsoft has not, at time of writing, issued a formal known-issue notice or a corrected build. Expect a follow-up patch in the coming days given how visible the complaints already are.

Until then, if you rely on Excel for anything time-sensitive, hold off on installing this week's Office updates or be ready to roll them back.

Common questions

Will I lose my spreadsheets if I uninstall the update?

No. Removing KB5002914 only removes the patch itself. Your Excel files, formulas and formatting are untouched.

Is this a security risk?

Only indirectly. The update fixed a security issue in Office. Uninstalling it means that fix is no longer in place, so weigh the inconvenience of broken copy-paste against the risk of running unpatched Office code, especially on work machines.