Last checked · Check before installing; only use the official link.
Today: Update needed if you are behind: 2 listed problems are being used in real attacks, and all have a fix.
Last checked . Word, Excel, Outlook, PowerPoint and OneNote on your computer.
The minimum safe version
There is no single version number for Microsoft Office. The newest fix listed here is: Fixed in the October 2026 Office updates (Microsoft Update Guide lists the version). If you have that or anything newer, you're covered against the fixed problems listed here (see the notes below).
- These are fixed by an update without one version number we can compare, so check their pages: Microsoft Office: a bug that lets a bad document skip Office's safety checks was used in real attacks, Microsoft Office (Word, Excel, Outlook): update to get 164 security fixes, Microsoft Word: a bug that lets a bad document skip a safety check was used in real attacks.
Where this number comes from:
How to check your version
These steps only look. They do not change anything.
On Windows
Easy way: Open Word (or Excel). Click File > Account > Update Options > Update Now. The version is shown under About Word.
Or type this in PowerShellRead-only. It only reads the version and changes nothing.
(Get-ItemProperty 'HKLM:\SOFTWARE\Microsoft\Office\ClickToRun\Configuration' -ErrorAction SilentlyContinue).VersionToReport
On Mac
Easy way: Open Word. Menu bar: Word > About Word. Or Word > Check for Updates.
Or type this in TerminalRead-only. It only reads the version and changes nothing.
defaults read "/Applications/Microsoft Word.app/Contents/Info" CFBundleShortVersionString
How to update Microsoft Office
Office updates itself. You can start it from File > Account > Update Options > Update Now (Windows) or Help > Check for Updates (Mac).
On Windows
- Open any Office app > File > Account.
- Click Update Options > Update Now.
- Close Office apps when asked.
On Mac
- Open any Office app > Help > Check for Updates.
- Install the updates Microsoft AutoUpdate shows.
Official update page Official website
Check before installing, and only use the official link. Never install an "update" from a pop-up, email or ad.
Latest problems (3)
- Microsoft Office (Word, Excel, Outlook): update to get 164 security fixes Patched: update now updated Oct 27, 2026
- Microsoft Word: a bug that lets a bad document skip a safety check was used in real attacks Patched: update now Being attacked now updated Oct 27, 2026
- Microsoft Office: a bug that lets a bad document skip Office's safety checks was used in real attacks Patched: update now Being attacked now updated Oct 27, 2026
For AI agents
This app as data, with minimum_safe_version: /products/microsoft-office.json. What changed lately: /changes.json. Read-only checks only; ask before installing anything.