November 2025 Microsoft Office Updates: A Complete Guide to Excel 2016, SharePoint Server versions, Office Online Server, and SharePoint Workflow Manager

November 2025 brought a new wave of essential Microsoft Office updates, targeting a wide array of products including Office 2016, Excel 2016, SharePoint Server versions, Office Online Server, and SharePoint Workflow Manager. These updates, announced publicly on Microsoft’s official support channels, address security issues and ongoing product improvements to ensure end-users and organizations remain protected and productive.​

Below, you’ll find details on each update, the security vulnerabilities addressed, the best way to install these patches, and why prompt installation is strongly advised.

Why Microsoft Office Updates Matter

Staying updated is critical for any business or individual using Microsoft Office. Many cyberattacks aim to exploit unpatched software vulnerabilities. Regular updates protect sensitive data from evolving threats, maintain compliance with industry standards, and ensure compatibility with new features and integrations.

The November 2025 update cycle is especially notable for its focus on closing security gaps and increasing resiliency across both consumer and enterprise Office products.​

Microsoft Office 2016: Security Essentials

Excel 2016 (KB5002811)

This update for Excel 2016 addresses multiple security vulnerabilities:

• Information Disclosure Vulnerability: Patch fixes that prevent unauthorized data access, plugging potential loopholes related to improper handling of objects in memory.

• Remote Code Execution (RCE): Fixes a vulnerability that could allow attackers to run arbitrary code if a user opens a specially crafted Excel file.

• Notable CVEs: CVE-2025-62203, CVE-2025-62202, CVE-2025-62201, CVE-2025-62200, CVE-2025-60726

Users are strongly encouraged to update as soon as possible, since exploiting these vulnerabilities could lead to data breaches or system compromise.

• The update can be obtained via Microsoft Update, the Microsoft Update Catalog, or the Microsoft Download Center.

• Applies to the MSI-based edition of Office 2016, but not Office 365 Click-to-Run installations.​

Office 2016 Core (KB5002810, KB5002809)

In addition to Excel, the Office 2016 suite itself received critical security updates:

• Prevents several information disclosure vulnerabilities across Office applications.

• Replaces previous updates and is cumulative—installing the latest patch brings your Office 2016 suite up to date.

• Full details on impacted files are available within Microsoft’s official documentation and download packages.

As with Excel, ensure you’re running the MSI version of Office 2016 before applying these patches.​

SharePoint Server Security Updates

SharePoint Server Subscription Edition (KB5002800)

SharePoint Server’s Subscription Edition patch delivers important fixes to help businesses keep their collaborative platforms secure and efficient. This update addresses vulnerabilities that could otherwise allow attackers to access or manipulate data stored within SharePoint environments.

SharePoint Server 2019 (KB5002803)

Microsoft continues to support on-premises SharePoint installations with timely security updates. November’s fix is critical for maintaining business continuity and defending sensitive business data against modern threats.

SharePoint Server 2016 (KB5002805)

Legacy SharePoint 2016 environments are not left behind, with this update providing critical security improvements for businesses unable to migrate to cloud or newer platforms.

Office Online Server (KB5002801)

Office Online Server saw vital security improvements in its November 2025 update. These updates are essential for organizations that use browser-based Office apps for document viewing and editing within enterprise environments. Keeping Office Online Server up-to-date is key for both security and seamless workflow integration.

SharePoint Workflow Manager (KB5002799)

The Workflow Manager, critical to many enterprise SharePoint workflows, was updated in November 2025 to close the latest vulnerabilities and improve overall reliability of workflow execution for businesses.

How to Get and Install the November 2025 Updates

Microsoft offers three main methods for users and administrators to access and install the latest Office updates:

• Microsoft Update: Preferred option for most users. By enabling automatic updates, critical security patches are downloaded and installed without user intervention.

• Microsoft Update Catalog: IT pros can manually download standalone update packages for deployment across teams or enterprises.

• Microsoft Download Center: Advanced users may opt for direct downloads, with instructions provided there for manual installation.

• Important: These patches typically apply to the Microsoft Installer (MSI) version of Office products. If you use the Click-to-Run edition (often tied to Office 365 subscriptions), you’ll receive updates through a separate channel.

Once installed, users can confirm the latest file versions via the product’s “About” dialog or by checking file properties, as detailed in Microsoft support articles.

Why Update Promptly?

Microsoft’s November 2025 security patches target key vulnerabilities actively monitored in the wild. Delayed patching increases the risk of exposure to malware, data theft, or system downtime from unpatched flaws. For businesses, this can have severe operational and financial impacts, as well as reputational harm.

The November 2025 batch of Office updates from Microsoft shows the company’s ongoing commitment to customer security and productivity. Whether you’re an IT pro, enterprise admin, or everyday Office user, applying these updates as soon as possible ensures you benefit from the latest security protections and product stability improvements. For more Microsoft news, guides, and updates, keep following msftnewsnow.com.