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

Create a technical support case if you need further support.

SECURITY BULLETIN: November 2020 Security Bulletin for Trend Micro Apex One and Apex One as a Service

    • Updated:
    • 22 Apr 2021
    • Product/Version:
    • Apex One All
    • Apex One as a Service
    • Platform:
Release Date: November 17, 2020
CVE Identifier(s): CVE-2020-28572, CVE-2020-28573, CVE-2020-28576, CVE-2020-28577, CVE-2020-28582, CVE-2020-28583
Platform(s): Windows
CVSS 3.0 Score(s): 5.3 - 5.7
Severity Rating(s): Medium

Trend Micro has released new patches for Trend Micro Apex One (On Premise) and Apex One as a Service (SaaS). These patches resolve multiple vulnerabilities related to local privilege escalation and improper access control information disclosure.


Affected Version(s)

ProductAffected Version(s)PlatformLanguage(s)
Apex OneOn Premise (2019)WindowsEnglish


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

ProductUpdated versionNotesPlatformAvailability
Apex One
(on prem)
CP 8422 *ReadmeWindowsNow Available
Apex One
 Monthly Patch
ReadmeWindowsNow Available

*Please note that one of the vulnerabilities were first patched in a previous CP; however, it is highly suggested customers apply the latest CP to ensure maximum coverage.

These are the minimum recommended version(s) 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

CVE-2020-28572Local Privilege Escalation Vulnerability
CVSSv3: 5.7: AV:L/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
A vulnerability in Trend Micro Apex One could allow an unprivileged user to abuse the product installer to reinstall the agent with additional malicious code in the context of a higher privilege.

CVE-2020-28573, CVE-2020-28576, CVE-2020-28577, CVE-2020-28582, CVE-2020-28583Improper Access Control Information Disclosure Vulnerabilities 
CVSSv3: 5.3: AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Improper access control information disclosure vulnerabilities in Trend Micro Apex One could allow an unauthenticated user to connect to the product server and reveal information such as the total agents managed by the server, version/build information and server hostname.


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.

Newer versions of the operating system (e.g. Windows 10) may protect against some vulnerabilities such as hard link privilege escalations.

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)

The following advisories may be found at Trend Micro's Zero Day Initiative Published Advisories site:
  • ZDI-20-1374
  • ZDI-20-1375
  • ZDI-20-1376
  • ZDI-20-1386
  • ZDI-20-1387
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.