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SECURITY BULLETIN: DLL Side-Loading Vulnerability in Trend Micro OfficeScan

    • Updated:
    • 26 Jul 2019
    • Product/Version:
    • OfficeScan 11.0
    • OfficeScan XG
    • Platform:
    • Windows 10
    • Windows 8 32-Bit
    • Windows 8 64-Bit
Release Date: July 26, 2019
CVE Identifier(s): CVE-2019-9492
Platform(s): Windows
CVSS 3.0 Score(s): 5.5
Severity Rating(s): Medium

Trend Micro has released new patches for Trend Micro OfficeScan.  These patches resolve a DLL side-loading vulnerability in the product.


Affected Version(s)

ProductAffected Version(s)PlatformLanguage(s)
OfficeScanXG (Version 12.0)WindowsEnglish
11.0 SP1WindowsEnglish
Please note that the latest Apex One (on-premise or SaaS) versions are NOT affected by this vulnerability.


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

ProductUpdated versionNotesPlatformAvailability
OfficeScanXG SP1 CP5383ReadmeWindowsNow Available
XG (non SP1) CP1952ReadmeWindowsNow Available
11.0 SP1 HF 6627ReadmeWindows*Contact Support

*Customers needing HF 6627 for OfficeScan 11.0 SP1 should contact their authrorized Trend Micro support representitive for further assistance.

These are the minimum versions 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

These updates resolve the following vulnerability in Trend Micro OfficeScan:

  • CVE-2019-9492 (CVSSv3 5.5: AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H) - an authenticated attacker with local access to an vulnerable system could exploit a DLL side-loading vulnerability to gain code execution and terminate the product's process - disabling endpoint protection.  

Due to the seriousness of any vulnerability, 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)

Upgrade; Update
Solution Id:
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