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SECURITY BULLETIN: Trend Micro Apex One Arbitrary File Upload with Command Injection Vulnerability

    • Updated:
    • 21 Apr 2021
    • Product/Version:
    • Apex One All
    • Platform:
Release Date: October 28, 2019
CVE Identifier(s): CVE-2019-18188
CVSS 3.0 Score(s): 8.2
Severity Rating(s): High

Trend Micro has released a Critical Patch (CP) for Trend Micro Apex One (on-premise) which resolves an arbitrary file upload with command injection vulnerability. 


Affected Version(s)

ProductAffected Version(s)PlatformLanguage(s)
Apex One (on premise)2019 (before build 2049)WindowsEnglish
Please note that Trend Micro Apex One-as-a-Service customers were already patched on October 14, 2019 and are no longer vulnerable.


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

ProductUpdated versionNotesPlatformAvailability
Apex OneCP 2049ReadmeWindowsAvailable Now

These are 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 CP resolves the following in affected versions of Trend Micro Apex One:

  • CVE-2019-18188: CVSSv3 8.2 – Affected versions of Apex One could be exploited by an attacker utilizing a command injection vulnerability to extract files from an arbitrary zip file to a specific folder on the Apex One server, which could potentially lead to remote code execution (RCE). The remote process execution is bound to the IUSR account, which has restricted permission and is unable to make major system changes. An attempted attack requires user authentication.

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:

  • Trend Micro Research

External Reference(s)

Upgrade; Update
Solution Id:
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