Should you update to Office for Mac 16.112.3?
No: install Office for Mac 16.114 instead. Office for Mac 16.112.3 is a security update Microsoft released on 1 Sep 2026 for Mac. It fixes 1 security flaw, 0 rated critical and 1 important by Microsoft.[1] None of them is known to be used in attacks.
It has since been replaced by Office for Mac 16.112.4, released 10 Sep 2026, which includes all of its fixes. If you’re on an older version, install that instead.
Should you update?
No: install Office for Mac 16.114 instead. Office for Mac 16.114 came out on 14 Oct 2026 and includes every fix in Office for Mac 16.112.3, so there’s no reason to stop at this one. Software Update offers the newest version your Mac can run.
Is Office for Mac 16.112.3 still safe?
Not any more. The 3 updates since, up to Office for Mac 16.114, fix 213 security flaws that Office for Mac 16.112.3 doesn’t, and each became public the day its fix shipped. Installing it is safe: get it only from Microsoft AutoUpdate (Help → Check for Updates in any Office app), or the App Store if Office came from there, never from a link in an email, text or pop-up.
What it fixes
Microsoft lists 1 security flaw, 0 rated critical and 1 important by Microsoft.[1] The critical or important one is:
| Flaw | Severity | What Microsoft calls it |
|---|---|---|
CVE-2026-81396 | Important | Microsoft Excel Remote Code Execution Vulnerability |
How to update, and how long it takes
Five to ten minutes. Each Office app closes while it updates.
- Open Word (or any Office app) and click Help in the menu bar.Choose Check for Updates. Microsoft AutoUpdate opens.
- Click Update All.Close the Office apps if it asks. AutoUpdate updates them one by one.
To check it worked: Word → About Microsoft Word: it shows e.g. Version 16.114 (26101123). It should say 16.112.4 or later.
16.112 vs 16.112.3
Office for Mac 16.112, released 11 Aug 2026, fixed 73 security flaws. Office for Mac 16.112.3 fixes 1 security flaw and includes the fixes before it, so going straight to 16.112.3 gets you both.
- Before: Office for Mac 16.112, 11 Aug 2026, 73 security flaws
- After: Office for Mac 16.112.4, 10 Sep 2026, 12 security flaws
- Office for Mac updates, every release and the latest version
- Updates, the latest version of everything HARD tracks
References
- ^ Microsoft. “Release notes for Office for Mac, September 01, 2026”, 1 Sep 2026.