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SECURITY BULLETIN: Trend Micro InterScan Web Security Virtual Appliance (IWSVA) Multiple Vulnerabilities

    • Updated:
    • 26 Apr 2021
    • Product/Version:
    • Interscan Web Security Virtual Appliance 6.5
    • Platform:
Release Date: May 19, 2020
CVE Identifier(s): CVE-2020-8603, CVE-2020-8604, CVE-2020-8605, CVE-2020-8606
Platform(s): Virtual Appliance
CVSS 3.0 Score(s): 5.3 - 9.8
Severity Rating(s): Medium - Critical

Trend Micro has released a new Critical Patch (CP) for Trend Micro InterScan Web Security Appliance (IWSVA) 6.5.  This CP resolves multiple vulnerabilities related to cross-site scripting (XSS), directory traversal information disclosure, authenticated command injection and authentication bypass. 


Affected Version(s)

ProductAffected Version(s)PlatformLanguage(s)
InterScan Web Security Virtual Appliance (IWSVA) Version 6.5Virtual ApplianceEnglish


Trend Micro has released the following solutions to address the issue:

ProductUpdated versionNotesPlatformAvailability
IWSVA6.5 SP2 Patch 4 (Build 1901)ReadmeVirtual ApplianceNow Available

This is the minimum version(s) of the patch and/or build required to address the issue. Trend Micro highly encourages customers to obtain the latest version of the product if there is a newer one available than the one listed in this bulletin.

Customers are encouraged to visit Trend Micro’s Download Center to obtain prerequisite software (such as Service Packs) before applying any of the solutions above.

Vulnerability Details

This update resolves multiple vulnerabilities in Trend Micro InterScan Web Security Virtual Appliance (IWSVA) 6.5 :

1. CVE-2020-8603 (CVSSv3 5.3): The product is affected by a cross-site scripting (XSS) vulnerability.

2. CVE-2020-8604 (CVSSv3 7.5): A remote attacker could potentially attain directory traversal abilities on the server, leading to information disclosure.

3. CVE-2020-8605 (CVSSv3 8.8): An authenticated remote attacker could exploit a command injection vulnerability in the product, leading to remote code execution (RCE).

4. CVE-2020-8606 (CVSSv3 9.8): An unauthenticated attacker may bypass authentication and access part of the application as an admin if the proxy is set to a certain port.

Due to the seriousness of these vulnerabilities, customers are highly encouraged to update to the latest build as soon as possible.

Mitigating Factors

Exploiting these type of vulnerabilities generally require that an attacker has access (physical or remote) to a vulnerable machine. In addition to timely application of patches and updated solutions, customers are also advised to review remote access to critical systems and ensure policies and perimeter security is up-to-date.

However, even though an exploit may require several specific conditions to be met, Trend Micro strongly encourages customers to update to the latest builds as soon as possible.


Trend Micro would like to thank the following individuals for responsibly disclosing these issues and working with Trend Micro to help protect our customers:

External Reference(s)

  • ZDI-20-675
  • ZDI-20-676
  • ZDI-20-677
  • ZDI-20-678
Upgrade; Update
Solution Id:
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