Microsoft 365 Apps updates
From Updates, in the HARD wiki · Updated
This article is about security updates for Microsoft 365 Apps. For every product, see Updates.
The latest version of Microsoft 365 Apps is 2609 build 20430.20182, which Microsoft released on 13 Oct 2026. It fixes 132 security flaws.[1] Microsoft rates 34 fixes critical, and attackers study each release to work out what it fixed.
Since June 2026, Microsoft has put out 5 Microsoft 365 Apps security releases.
Should you update your Office apps?
Yes, this week. Microsoft 365 Apps 2609 build 20430.20182 came out on 13 Oct 2026. None of its 132 fixes is known to be used in attacks yet. Its page lists what each fix covers.
How to update
- Open Word (or Excel or PowerPoint) and click File, then Account.In Outlook it’s File → Office Account.
- Click Update Options, then Update Now.Office downloads the update in the background. Close your Office apps when it asks; they reopen when it’s done.
To see which version you have: File → Account in Word or Excel: under About it shows e.g. Version 2609 (Build 20430.20182 Click-to-Run).
Every release
Every Microsoft 365 Apps security release since June 2026, newest first.
References
- ^ Microsoft. “Release notes for Microsoft Office security updates”, each release’s notes.