Sign In with your
Trend Micro Account
Need Help?
Need More Help?

Create a technical support case if you need further support.

SECURITY BULLETIN: Input Validation Vulnerability in Trend Micro Rootkit Driver (Multiple Products)

    • Updated:
    • 28 Apr 2021
    • Product/Version:
    • Apex One 2019
    • Apex One as a Service
    • Cloud One - Workload Security All
    • Deep Security 10.0
    • Deep Security 11.0
    • Deep Security 12.0
    • Housecall
    • OfficeScan XG
    • Portable Security 2.0
    • Portable Security 3.0
    • Safe Lock 2.0
    • Safe Lock TXOne Edition
    • Worry-Free Business Security Advanced 10.0
    • Worry-Free Business Security Services All
    • Platform:
Release Date: August 4, 2020
CVE Identifier(s): CVE-2020-8607
Platform(s): Windows
CVSS 3.1 Score(s): 6.7 (AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H )
Severity Rating(s): Medium

Trend Micro has released patches and/or updates to resolve an input validation vulnerability for multiple Trend Micro products that utilize a particular rootkit protection driver.


Affected Products

ProductAffected Version(s)Platform
Apex One2019 (On-premise)Windows
OfficeScanXG SP1Windows
Deep Security &
Cloud One Workload Security (C1WS)
12.x, 11.x, 10.xWindows
Worry-Free Business Security10.0 SP1Windows
Services (SaaS)Windows
Trend Micro Security (Consumer Family)2020 (v16)Windows
2019 (v15)Windows
Safe Lock2.0 SP1Windows
TXOne EditionWindows
ServerProtectfor Storage (SPFS) 6.0Windows
for Network Appliance Filters (SPNAF) 5.8Windows
for EMC Celerra (SPEMC) 5.8Windows
for Windows / Netware (SPNT) 5.8Windows
Portable Security2.x, 3.xWindows
Anti-Threat Toolkit (ATTK)1.62.1240 and belowWindows
Rootkit Buster2.2Windows


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

ProductUpdated versionNotesPlatformAvailability
Apex One2019 Patch 3 b8378ReadmeWindowsNow Available
SaaS July 2020 Monthly Maintenance (b202007)DeployedWindowsNow Available
OfficeScanXG SP1 Patch 3 b5684ReadmeWindowsNow Available
Deep Security &
Cloud One Workload Security (C1WS)
DS 12.0 U11ReadmeWindowsNow Available
DS 11.0 U22ReadmeWindowsNow Available
DS 10.0 U27ReadmeWindowsNow Available
C1WS Agents (SaaS)Latest Updates Available for DeploymentWindowsNow Available
Worry-Free Business Security10.0 SP1 Patch 2228ReadmeWindowsNow Available
WFBS Services (SaaS) July 18 Hotfix (WIndows Client Build 6.7.1374 / 14.2.1194)DeployedWindowsNow Available
Trend Micro Security (Consumer Family)2020 (v16)Deployed via ActiveUpdate (AU)WindowsNow Available
2019 (v15)*Deployed via ActiveUpdate (AU)WindowsNow Available
Safe Lock2.0 SP1 Patch 4 (b6156)ReadmeWindowsNow Available
TXOne Edition CP b1034ReadmeWindowsNow Available
ServerProtectSPFS 6.0 CP b1268ReadmeWindowsNow Available
SPNAF 5.8 SP1 Patch 2 CP1290ReadmeWindowsNow Available
SPEMC 5.8 CP1566ReadmeWindowsNow Available
SPNT 5.8 Patch 5 (b1567)ReadmeWindowsNow Available
Portable Security3.0Deployed via ActiveUpdate (AU)WindowsNow Available
2.0 Deployed via ActiveUpdate (AU)WindowsNow Available
HouseCall8.0Latest Version on SiteWindowsNow Available
Anti-Threat Toolkit (ATTK)1.62.1240Latest Version on SiteWindowsNow Available
Rootkit Buster**Retired - See note below

* Customers running Trend Micro Security (Consumer) 2019 who wish to resolve the issue immediately are encouraged to update to 2020 (v16) which is now available.

** Trend Micro has decided to retire the standalone Rootkit Buster tool due to its redundancy since most of its critical functionality has already been integrated into Trend Micro’s other protection products.

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

An input validation vulnerability found in multiple Trend Micro products utilizing a particular version of a specific rootkit protection driver could allow an attacker in user-mode with administrator permissions to abuse the driver to modify a kernel address that may cause a system crash or potentially lead to code execution in kernel mode.

Please note: an attacker must already have obtained administrator access on the target machine (either legitimately or via a separate unrelated attack) to exploit this vulnerability.

Mitigating Factors

Exploiting these types of vulnerabilities generally requires 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.

As a potential exploit requires pre-obtained administrator access – the single most important mitigation against this type of attack is to ensure administrative credentials on systems are secured since an attacker with these credentials can not only exploit this vulnerability but potentially can have a much more significant impact on the target system or network.



Trend Micro acknowledges that the issue was first discovered by Bill Demirkapi (independent researcher).


External Reference(s)

Upgrade; Update
Solution Id:
Did this article help you?

Thank you for your feedback!

*This form is automated system. General questions, technical, sales, and product-related issues submitted through this form will not be answered.

If you need additional help, you may try to contact the support team. Contact Support

To help us improve the quality of this article, please leave your email here so we can clarify further your feedback, if neccessary:
We will not send you spam or share your email address.

*This form is automated system. General questions, technical, sales, and product-related issues submitted through this form will not be answered.