Macros in Microsoft Word are incredibly powerful scripts written in Visual Basic for Applications (VBA). They allow users to automate highly complex, repetitive formatting tasks or perform deep data manipulation across massive documents. Unfortunately, because macros can execute arbitrary code on your system, they have historically been the single most common delivery mechanism for malware and ransomware embedded within malicious .docm email attachments. If your organization’s workflow does not explicitly rely on custom Word automation, leaving macro execution enabled poses a severe, unnecessary security risk.
This guide explains how to completely disable Macro (VBA) execution in Microsoft Word via the Trust Center, ensuring that malicious scripts cannot run, even if a user accidentally clicks “Enable Content.”
Disable Macros via the Trust Center
Microsoft Word includes a dedicated security hub called the Trust Center, which governs how the application handles potentially dangerous active content.
- Launch Microsoft Word and open a blank document.
- Click on the File tab located in the top-left corner of the Ribbon.
- Navigate to the very bottom of the left-hand menu and click on Options.
- The Word Options dialogue box will appear. In the left-hand pane, select Trust Center.
- On the right side of the window, click the button labelled Trust Center Settings….
- A new window will open. In the left-hand navigation pane of the Trust Center, select Macro Settings.
- Under the “Macro Settings” section, you will see four radial buttons. Select the top option: Disable all macros without notification.
- (Crucial Security Step): Ensure that the checkbox below the radial buttons labelled Trust access to the VBA project object model is completely unchecked.
- Click OK to close the Trust Center, and click OK again to close the Word Options window.
The Security Impact
By selecting “Disable all macros without notification,” you are enforcing a strict zero-tolerance policy for VBA scripts.
If a user opens a macro-enabled document (.docm or a legacy .doc), Word will silently block the embedded script from executing. Furthermore, the yellow “Security Warning” banner that typically prompts users to “Enable Content” will no longer appear. This completely eliminates the risk of social engineering attacks where a malicious document instructs the user to click the yellow button to “decrypt” or “view” the file.