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  Trend Micro Incorporated                                 April 3, 2019

  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    Trend Micro(TM) Worry-Free(TM) Business Security 9.0 Service Pack 3
                        Critical Patch - Build 4394
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  
Contents
     ==========================================================

     1.  Overview of This Critical Patch Release

         1.1 Issues

         1.2 Files Included in This Release

     2.  Documentation Set

     3.  System Requirements

     4.  Installation

         4.1 Installing

         4.2 Uninstalling

     5.  Post-installation Configuration

     6.  Known Issues

     7.  Release History

     8.  Contact Information

     9.  About Trend Micro

     10. License Agreement

     ==========================================================


  1. Overview of This Critical Patch Release
  ======================================================================

     1.1 Resolved Known Issues
     ===================================================================  
     This critical patch resolves the following issue:
     
     Issue:    A possible zero-day vulnerability may allow an attacker  
               to bypass unauthorized log-on protection and launch a  
               Path Traversal Attack on the Worry-Free Business Security 
               web console.
               ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     Solution: This critical patch updates the Worry-Free Business 
               Security server program to remove the vulnerability.


     1.2 Files Included in this Release
     ===================================================================
     A. Files for Current Issue
     -------------------------------------------------------------------
        Filename                               Build No.
        ----------------------------------------------------------------
        cgiRecvFile.exe                        19.0.0.4394


     B. Files for Previous Issues
     -------------------------------------------------------------------
        Not applicable.


  2. Documentation Set
  ======================================================================
     To download or view electronic versions of the documentation set 
     for this product, go to http://docs.trendmicro.com


  3. System Requirements
  ======================================================================
     You must install Worry-Free Business Security 9.0 Service Pack 3 
     before installing this critical patch.     


  4. Installation
  ======================================================================
     This section explains key steps for installing the critical patch.


     4.1 Installing
     ===================================================================
     To install:

     1. Copy the critical patch executable file to a temporary folder, 
        for example, "C:\temp".

     2. Double-click the file. The modules are automatically copied to
        the correct destination.
      
     This critical patch installation package automatically rolls back 
     the Security Server to its previous configuration if there are
     problems during installation.

     If you encounter problems after installation, manually roll back 
     the Security Server to the original configuration.


     4.2 Uninstalling
     ===================================================================
     To manually roll back to the previous build:

     1. Locate the backup folder that the critical patch package created 
        in the "\PCCSRV\Backup\CriticalPatch_B4394" directory.

     2. Copy the backup modules to the original folders.


  5. Post-installation Configuration
  ======================================================================
     No post-installation steps are required.

     NOTE: Trend Micro recommends that you update your scan engine and
           virus pattern files immediately after installing the product.


  6. Known Issues
  ======================================================================
     There are no known issues for this critical patch release.


  7. Release History
  ======================================================================
     For more information about updates to this product, go to:

     http://www.trendmicro.com/download


  8. Contact Information
  ======================================================================
     A license to Trend Micro software usually includes the right to
     product updates, pattern file updates, and basic technical support
     for one (1) year from the date of purchase only. After the first
     year, you must renew Maintenance on an annual basis at 
     Trend Micro's then-current Maintenance fees.

     Contact Trend Micro via fax, phone, and email, or visit our website
     to download evaluation copies of Trend Micro products.

     http://www.trendmicro.com/us/about-us/contact/index.html

     NOTE: This information is subject to change without notice.


  9. About Trend Micro
  ======================================================================
     Smart, simple, security that fits

     As a global leader in IT security, Trend Micro develops innovative
     security solutions that make the world safe for businesses and
     consumers to exchange digital information.

     Copyright 2019, Trend Micro Incorporated. All rights reserved.

     Trend Micro, Worry-Free, and the t-ball logo are trademarks of 
     Trend Micro Incorporated and are registered in some jurisdictions. 
     All other marks are the trademarks or registered trademarks of 
     their respective companies.


  10. License Agreement
  ======================================================================
     View information about your license agreement with Trend Micro at: 

     http://www.trendmicro.com/us/about-us/legal-policies/
        license-agreements

     Third-party licensing agreements can be viewed:
    
     - By selecting the "About" option in the application user interface

     - By referring to the "Legal" page of the Administrator's Guide