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SECURITY BULLETIN: Trend Micro Commercial Endpoints Root Login Bypass with Directory Traversal Vulnerability

    • Updated:
    • 26 Apr 2021
    • Product/Version:
    • Apex One All
    • OfficeScan 11.0
    • OfficeScan XG
    • Worry-Free Business Security Advanced 10.0
    • Worry-Free Business Security Advanced 9.5
    • Worry-Free Business Security Standard 10.0
    • Worry-Free Business Security Standard 9.5
    • Platform:
Release Date: October 28, 2019
CVE Identifier(s): CVE-2019-18189
CVSS 3.0 Score(s): 8.8
Severity Rating(s): High

Trend Micro has released Patches and Critical Patches (CPs) for Trend Micro Commercial Endpoint Protection products - Apex One, OfficeScan, and Worry-Free Business Security - which resolve a root login bypass with directory traversal vulnerability. 


Affected Version(s)

ProductAffected Version(s)PlatformLanguage(s)
Apex One (on premise)All (2019 before CP 2049)WindowsEnglish
OfficeScan (OSCE)XG SP1, XG, 11.0 SP1WindowsEnglish
Worry-Free Business Security (WFBS)10.0 SP1, 10.0, 9.5WindowsEnglish
Please note that Trend Micro Apex One-as-a-Service and Worry-Free Services customers are not affected.


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

ProductUpdated versionNotesPlatformAvailability
Apex One (on premise)CP 2049ReadmeWindowsAvailable Now
OfficeScanXG SP1 CP 5427ReadmeWindowsAvailable Now
XG CP 1962ReadmeWindowsAvailable Now
11.0 SP1 CP 6638ReadmeWindowsAvailable Now
Worry-Free Business Security10.0 SP1 Patch 2179ReadmeWindowsAvailable Now
10.0 Patch 1569ReadmeWindowsAvailable Now
9.5 CP 1513ReadmeWindowsAvailable Now

These are the minimum versions of the patches and/or builds 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

These Patches and CPs resolve the following in affected versions of Trend Micro commercial endpoint protection products listed above:

  • CVE-2019-18189 (CVSSv3 8.8) – A directory traversal vulnerability may allow an attacker to bypass authentication and log on to an affected product’s management console as a root user. The vulnerability does not require 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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