Security Update for Microsoft Visual Basic for Applications (KB974945) 6.5

Security Update for Microsoft Visual Basic for Applications (KB974945)

This update addresses security vulnerabilities in the Microsoft Visual Basic for Applications (VBA) runtime that could allow remote code execution if a user opens a specially crafted file or runs a malicious macro. By improving how VBA validates and loads projects, the update helps protect systems running applications that embed the VBA engine, including Microsoft Office and third-party software.

Key points:

• Purpose: Hardens the VBA runtime against exploits delivered through malicious documents or VBA projects.
• Scope: Applies to systems with applications that use the VBA engine; it does not add new features.
• User impact: Transparent to end users; macro behavior remains the same under normal use.
• Deployment: Delivered as a security update; installation may require a restart depending on system state.
• Recommendation: Install on all supported systems with VBA-capable applications to reduce security risk.

Security Update for Microsoft Visual Basic for Applications (KB974945) is developed by Microsoft. The most popular version of this product among our users is 6.5. The names of program executable files are Microsoft Visual Basic 6.0.exe, rundll32.exe, VB6.EXE, VSWC611_61FD59BD.exe and WPWIZ.EXE.