Trend Micro Apex One™ as a Service Readme

Readme Last Update: January 5th, 2026

Trend Micro Apex One™ as a Service

English - Windows - 32-bit / 64-bit

Hotfix - Build 202601

NOTICE: Trend Micro developed this hotfix as a workaround or solution to a problem reported by customers. As such, this hotfix has received limited testing and has not been certified as an official product update. Consequently, THIS HOTFIX IS PROVIDED "AS IS". TREND MICRO MAKES NO WARRANTY OR PROMISE ABOUT THE OPERATION OR PERFORMANCE OF THIS HOTFIX NOR DOES TREND MICRO WARRANT THIS HOTFIX AS ERROR FREE.TO THE FULLEST EXTENT PERMITTED BY LAW, TREND MICRO DISCLAIMS ALL IMPLIED AND STATUTORY WARRANTIES, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A PARTICULAR PURPOSE.

Contents

Hotfix Release Information

Resolved Known Issues
Enhancements
Additional Information

Documentation Set
Post-installation Configuration
Known Issues
Contact Information
About Trend Micro
License Agreement

1. Hotfix Release Information

Resolved Known Issues

Trend Micro Apex Central™ as a Service

This Hotfix resolves the following issue(s):

Issue 1 (pct-29659),

An issue related to API keys may prevent the system from updating Trend Miro Apex One as a Service to Trend Vision One (Standard Endpoint Protection).

Solution

This Hotfix resolves the issue.

Issue 2 (pct-85926),

The system may include incorrect operating system information in logs when forwarding syslogs.

Solution

This Hotfix resolves the issue.

Issue 3 (VRTSJIRACLOUD-15174),

An issue related to DOS command processing is found in the system.

Solution

This Hotfix resolves the issue.

Issue 4 (VRTSJIRACLOUD-15174),

An issue related to dynamic file loading is found in the system.

Solution

This Hotfix resolves the issue,

Trend Micro Apex One™ as a Service

This Hotfix resolves the following issue(s):

Issue 1 (pct-85486),

An issue related to maximum character limit and comments in Data Protection configuration may prevent the system from deploying or processing the configuration properly.

Solution

This Hotfix updates the Trend Micro Apex One Server and Security Agent program to resolve the issue.

Issue 2 (pct-84352),

An issue related to Trend Micro Apex One Central Agent service may cause the Trend Micro Apex One server to become unresponsive.

Solution

This Hotfix updates the Trend Micro Apex One Server program to resolve the issue.

Issue 3 (pct-83618),

Virtual Analyzer logs may contain incorrect execution time information.

Solution

This Hotfix updates the Trend Micro Apex One Server program to resolve the issue.

Issue 4 (pct-82350),

When resuming from sleep mode, an issue related to the Apex One Common Client Solution Framework service may cause the system to become unresponsive or encounter a Blue Screen of Death error.

Solution

This Hotfix updates the Trend Micro Apex One Security Agent program to resolve the issue.

Issue 5 (pct-85606),

An issue may cause the Apex One common Client Solution Framework to become unresponsive.

Solution

This Hotfix updates the Trend Micro Apex One Security Agent program to resolve the issue.

Issue 6 (pct-84792),

When switching between Data Loss Prevention (DLP) modes, the DLP pattern file may be removed and reverted to an older version.

Solution

This Hotfix updates the Trend Micro Apex One Security Agent program to resolve the issue.

Issue 7 (pct-84708),

A hotfix update may prevent the system from restarting the Behavior Monitoring kernel driver to complete th driver upgrade process.

Solution

This Hotfix updates the Trend Micro Apex One Security Agent program to resolve the issue.

Issue 8 (pct-84406),

The system may incorrectly detect outdated versions of .dll files in the Trend Micro Apex One agent package backup folder.

Solution

This Hotfix updates the Trend Micro Apex One Security Agent program to resolve the issue.

Trend Micro Apex One™ (Mac) as a Service

There are no issues for this Hotfix release.

Enhancements

Trend Micro Apex Central™ as a Service

There are no enhancements for this Hotfix release.

Trend Micro Apex One™ as a Service

The following enhancements are included in this Hotfix:

Enhancement 1 ( pct-85899),

This Hotfix updates the Trend Micro Apex One Security Agent program to enhance protection for the PendingFileRenameOperations registry key.

Enhancement 2 ( pct-49041),

This Hotfix enhances the Smart Protection Service Relay configuration update process to prevent redundant queries.

Enhancement 3 (VRTSJIRACLOUD-15043), (VRTSJIRACLOUD-15033), (VRTSJIRACLOUD-15038), (VRTSJIRACLOUD-15048), (VRTSJIRACLOUD-15185),

This Hotfix updates the Trend Micro Apex One Security Agent program to protect against a potential Local Privilege Escalation security issue.

Enhancement 4 (pct-78037), (pct-72414),

This Hotfix updates the Virus Scan Engine (VSAPI) to version 25.610.1003 to enhance product capabilities.

Enhancement 5 (pct-78722),

This Hotfix updates the Trend Micro Apex One Server program to detect administrative operations with the correct system event type.

Trend Micro Apex One™ (Mac) as a Service

The following enhancements are included in this Hotfix:

Enhancement 1 (macepp-2028),

This Hotfix updates multiple third-party libraries in Trend Micro Apex One (Mac) Security Agent to enhance product security.

Enhancement 2 (VRTS-15200),

This Hotfix updates the iCore module in Trend Micro Apex One (Mac) Security Agent to enhance product security.

Enhancement 3 (macepp-2149),

This Hotfix enables Trend Micro Apex One (Mac) to send detection severity level information to Trend Micro Apex Central.

Additional Information

Trend Micro Apex Central™ as a Service

No additional information available.

Trend Micro Apex One™ as a Service

Security Agent version: 14.0.20521

Security Agent restart: Yes

Security Agent OS reboot: Not required for Security Agents are running build versions later than 10000.

Estimated size of network traffic (in terms of bandwidth) required for deployment:

32-bit Security Agent Hotfix = 392 MB

64-bit Security Agent Hotfix = 527 MB

Trend Micro Apex One™ (Mac) as a Service

Security Agent Version: 3.5.8181

Security Agent Restart Requirement: Not required

Estimated size of network traffic (in terms of bandwidth) required for deployment:

64-bit Security Agent Hotfix = 271MB

Additional Requirements: Enable web browser extension (https://success.trendmicro.com/en-US/solution/KA-0011156)

2. Documentation Set

Trend Micro Apex One™ as a Service documents

Readme: Contains a list of known issues and may also contain late-breaking product information not found in the Online Help or printed documentation.
Knowledge Base: An online database of problem-solving and troubleshooting information. It provides the latest information about known product issues. To access the Knowledge Base, go to the following website: http://esupport.trendmicro.com

Trend Micro Apex Central™ as a Service documents

Administrator's Guide: A PDF document that provides detailed instructions for how to configure and manage the Trend Micro Apex Central™ as a Service console and features.
Data Protection Lists (Chapter 1 only): A PDF document that lists predefined data identifiers and templates for Data Loss Prevention.
Widget and Policy Management Guide: Explains how to configure Dashboard widgets and Policy Management widgets on the Trend Micro Apex Central™ as a Service console.
Automation Center: Online user guides and references that explain how to use the Apex Central Automation APIs: https://automation.trendmicro.com/apex-central/home
Online Help: Provides "how to's", usage advice, and field-specific information. The Help is also accessible from the Trend Micro Apex Central™ as a Service console.

Trend Micro Apex One™ server documents

Administrator's Guide: A PDF document that discusses getting started information and Trend Micro Apex One™ server administration.
Online Help: Provides "how to's", usage advice, and field-specific information. The Help is accessible from the Trend Micro Apex One™ server, agent, and Policy Server consoles, and from the OfficeScan Master Setup.

Trend Micro Apex One™ (Mac) server documents

Administrator's Guide: A PDF document that discusses getting started information and Trend Micro Apex One™ (Mac) server administration.
Online Help: Provides "how to's", usage advice, and field-specific information for Trend Micro. The Help is also accessible from the Trend Micro Apex One™ as a Service console.

Security Agent documents

Trend Micro Apex One™ Security Agent Online Help: Discusses getting started information, Trend Micro Apex One™ Security Agent installation procedures, and Trend Micro Apex One™ Security Agent management.
Trend Micro Apex One™ Security Agent Readme: Contains a list of known issues and may also contain late-breaking product information not found in the Online Help or printed documentation.
Trend Micro Apex One™ (Mac) Security Agent Online Help: Discusses getting started information, Trend Micro Apex One™ (Mac) Security Agent installation procedures, and Trend Micro Apex One™ (Mac) Security Agent management.

online documentation

3. Post-installation Configuration

No post-installation steps are required.

NOTE: Trend Micro recommends that you update your scan engine and virus pattern files immediately after installing the product.

4. Known Issues

Trend Micro Apex Central™ as a Service

There are no known issues for this Hotfix release.

Trend Micro Apex One™ as a Service

Known issues in this release:

Known issue 1

Security Agent consoles running build 13.95 display an incorrect policy name. To resolve this issue, upgrade the Security Agent to 14.0. After the Security Agent contacts the server, the policy name displays correctly.

Known issue 2

Off-premises and Security Agents in Independent mode cannot update the Certified Safe Software Pattern from external update sources.

Known issue 3

Coexist mode Security Agents on endpoints with Windows Defender may experience installation issues or be unable to upload data to the Apex One server due to a file locking issue. To resolve this issue, add Endpoint Sensor (ESEServiceShell.exe and ESClient.exe) in the exclusions list of Windows Defender to prevent the locking issue.

Known issue 4

After copying a file to a remote server using a relative path as the source, Apex One is unable to translate the relative path into the full system directory.

Known issue 5

The quality of RCA analysis chain image files is reduced when viewing the files using Windows 10 Photo Viewer.

Known issue 6

When attempting to start a Historical Investigation from the Attack Discovery Detections widget that includes Registry value name or Registry value data criteria, the Historical Investigation displays an error message if the length of the Registry value name exceeds 260 characters or the Registry value data exceeds 64 characters.

Known issue 7

After updating the Attack Discovery Pattern file (tmesadp.ptn) on Security Agents, a database schema error may occur that causes the Endpoint Sensor feature to continuously report the same detections to the server during each synchronization. This causes duplicate records to display on the Apex Central server.

Known issue 8

Root Cause Analysis email attachment results may also include temporary files created when the user saved the file.

Known issue 9

The number of matched endpoints that display on a Root Cause Analysis chain may appear to be greater than the total if the Security Agent on an endpoint was uninstalled or no longer reports to the same managing server.

Known issue 10

The Endpoint Sensor service may have high memory usage.

Known issue 11

The Endpoint Sensor may have high peak CPU usage occasionally.

Known issue 12

Endpoint Sensor has CPU peak during Windows Update phase.

Known issue 13

The user or account name in ADE detection may be empty.

Known issue 14

The EC module may stop responding while handling NULL data which may cause the ESEService and ADE functionality to behave abnormally.

Known issue 15

In rare conditions, ESEService stops responding while unloading.

Known issue 16

A time zone issue may cause the system to display different log generation time information in the web console. In the web console, the system displays the log generation time in the time zone of the Apex One server.

The Apex One server stores the log generation time information in GMT+0.
The Security Agent sends the log generation time information (GMT+0 or local time) to the Apex One server.

Trend Micro Apex One™ (Mac) as a Service

Known issues in this release:

Known issue 1

After enabling the Scan Time Machine option for Manual Scan and Scheduled Scan, Apex One (Mac) cannot perform any actions (clean, quarantine, or delete) on detected malware threats due to a permission limitation in Mac OS. Configured scan actions are displayed as unsuccessful in the product logs.

Known issue 2

When performing a historical investigation on Apex One (Mac) endpoints, the system replaces a slash (/) with a colon (:) in file names, preventing users from searching for file names that contain backslashes in investigation results.

To resolve this issue, use a colon (:) to search for the files.

5. Contact Information

A license to Trend Micro software usually includes the right to product updates, pattern file updates, and basic technical support for one (1) year from the date of purchase only. After the first year, you must renew Maintenance on an annual basis at Trend Micro's then-current Maintenance fees.

Contact Trend Micro via fax, phone, and email, or visit our website to download evaluation copies of Trend Micro products.

https://www.trendmicro.com/en_us/contact.html

NOTE: This information is subject to change without notice.

6. About Trend Micro

Smart, simple, security that fits

As a global leader in IT security, Trend Micro develops innovative security solutions that make the world safe for businesses and consumers to exchange digital information.

Copyright 2026, Trend Micro Incorporated. All rights reserved.

Trend Micro, Trend Micro Apex Central, Trend Micro Apex One, Trend Micro Apex One (Mac) and the t-ball logo are trademarks of Trend Micro Incorporated and are registered in some jurisdictions. All other marks are the trademarks or registered trademarks of their respective companies.

7. License Agreement

View information about your license agreement with Trend Micro at: https://www.trendmicro.com/en_us/about/legal.html

Third-party licensing agreements can be viewed:

By selecting the "About" option in the application user interface
By referring to the "Legal" page of the Administrator's Guide