Should you update to Office for Mac 16.110?
No: install Office for Mac 16.114 instead. Office for Mac 16.110 is a security update Microsoft released on 16 Jun 2026 for Mac. It fixes 26 security flaws, 7 rated critical and 19 important by Microsoft.[1] None of them is known to be used in attacks.
It has since been replaced by Office for Mac 16.111, released 14 Jul 2026, which includes all of its fixes.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 16.110, so there’s no reason to stop at this one. Software Update offers the newest version your Mac can run.
Is Office for Mac 16.110 still safe?
Not any more. The 6 updates since, up to Office for Mac 16.114, fix 362 security flaws that Office for Mac 16.110 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 26 security flaws, 7 rated critical and 19 important by Microsoft.[1] The 26 critical and important ones are:
| Flaw | Severity | What Microsoft calls it |
|---|---|---|
CVE-2026-45456 | Critical | Microsoft Outlook and Word Remote Code Execution Vulnerability |
CVE-2026-45458 | Critical | Microsoft Outlook and Word Remote Code Execution Vulnerability |
CVE-2026-45460 | Critical | Microsoft Office Information Disclosure Vulnerability |
CVE-2026-45461 | Critical | Microsoft Office Remote Code Execution Vulnerability |
CVE-2026-45463 | Critical | Microsoft Office Remote Code Execution Vulnerability |
CVE-2026-45472 | Critical | Microsoft Office Remote Code Execution Vulnerability |
CVE-2026-45474 | Critical | Microsoft Office Remote Code Execution Vulnerability |
CVE-2026-44817 | Important | Microsoft Excel Remote Code Execution Vulnerability |
CVE-2026-44818 | Important | Microsoft Excel Remote Code Execution Vulnerability |
CVE-2026-44819 | Important | Microsoft Office Remote Code Execution Vulnerability |
CVE-2026-44820 | Important | Microsoft Excel Remote Code Execution Vulnerability |
CVE-2026-44821 | Important | Microsoft Office Information Disclosure Vulnerability |
CVE-2026-44822 | Important | Microsoft Excel Information Disclosure Vulnerability |
CVE-2026-44823 | Important | Microsoft Excel Remote Code Execution Vulnerability |
CVE-2026-44824 | Important | Microsoft Office Remote Code Execution Vulnerability |
CVE-2026-45455 | Important | Microsoft Excel Information Disclosure Vulnerability |
CVE-2026-45457 | Important | Microsoft Word Remote Code Execution Vulnerability |
CVE-2026-45459 | Important | Microsoft Excel Security Feature Bypass Vulnerability |
CVE-2026-45466 | Important | Microsoft Word Information Disclosure Vulnerability |
CVE-2026-45469 | Important | Microsoft Excel Remote Code Execution Vulnerability |
CVE-2026-45471 | Important | Microsoft Word Remote Code Execution Vulnerability |
CVE-2026-45475 | Important | Microsoft Office Remote Code Execution Vulnerability |
CVE-2026-45485 | Important | Microsoft Office Information Disclosure Vulnerability |
CVE-2026-45486 | Important | Microsoft Word Remote Code Execution Vulnerability |
CVE-2026-45643 | Important | Microsoft Word Remote Code Execution Vulnerability |
CVE-2026-45645 | Important | Microsoft Office 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 16.111 or later.
Before and after
- After: Office for Mac 16.111, 14 Jul 2026, 75 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, June 16, 2026”, 16 Jun 2026.