Office Online Server

Office Online Server updates

All published releases for Office Online Server, newest first: what each update changes, whether to install it and any confirmed known issues. Latest release: November 10, 2026.

Terms & labels

Label legend

Security: Contains fixes for security vulnerabilities.
Preview: Optional update with new features and fixes, without new security patches. Its content joins the next Patch Tuesday update.
Out-of-band: Released outside the usual monthly schedule, usually to fix a specific problem.
Cumulative: Includes everything from earlier updates, so the latest one is enough.
Zero-day: Microsoft reports a vulnerability that was already exploited or publicly known when the fix came out.
Windows Insider Preview: A pre-release build for testers, not meant for everyday PCs.
Updated: We revised this page after publishing because Microsoft changed its notes.

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Office Online Server OOS Office Online Server Security update

KB5002503 May 14, 2024
Excel remote code execution flaw addressed

Addresses one Important Microsoft Excel remote code execution vulnerability, CVE-2024-30042.
Check the newer update, KB5002601
Key changes 1 CVE · 1 change

Fix Excel: An Excel flaw that could let an attacker run code remotely is addressed.

CVSS 7.8 CVE-2024-30042: Microsoft Excel Remote Code Execution Vulnerability

Read update Source: Microsoft
Build

16.0.10410.20003

Security

1 vulnerability fixed

Restart
Required

Office Online Server updates

Office Online Server updates

Excel remote code execution flaw addressed