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Trellix Agent 5.8.2 Release Notes

  • Published on Aug 26, 2026
  • 2 minute(s) read
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Trellix Agent 5.8.2 release includes feature enhancements and resolved issues.

Release details

For release date and build number details of 5.8.x, see KB51573.

Rating

The rating defines the urgency for installing this update.

This release is mandatory for all environments. You must apply these updates to maintain a viable and supported product.

What's new in Trellix Agent 5.8.2

Enhancements

  • ePO - On-prem update 3 improves the secure communication between the client and distributed repository that is compatible with Trellix Agent 5.8.2.

  • You can now disable the About option in the Trellix system tray menu from Agent policy on Windows systems.

  • You can now install the Trellix Agent on Linux systems using custom ports (TCP and UDP ports) through the command line.

  • FQDN changes include:

    URL changes for Agent version 5.8.2 with updated Cloud Bridge version 2.1.0 and 2.2.0:

    For more details on FQDN changes, see KB13641.

  • You can now provide the temporary installation directory path as an option when installing Trellix Agent using install.sh on Linux systems.

  • With Trellix Agent version 5.8.2, you can install the free System Information Reporter (SIR) extension to get more visibility into the installed software on your systems managed by Trellix Agent. SIR support requires a Trellix professional services contract that must be purchased separately.

  • Trellix Agent is now compatible and functions with 3072-bit key certificates in ePO - On-prem update 3.

  • With Trellix Agent 5.8.2, Trellix supports only msgbus integrated products on Linux platforms and has removed support for backcompat products (LPC and plug-in integration) and mfert.

  • The logs for mcupdater, MFEdx, and Agent uninstall have been enhanced. For more details, see Trellix Agent logs.

  • Operating system data is now retrieved from cache when WMI fails.

Trellix Agent compatibility with other products

To view the list of products and versions that are compatible with Trellix Agent 5.8.x release, see KB96739.

Resolved issues in Trellix Agent 5.8.2

This release resolves known issues.

Table 5. Installation

Reference

Resolution

MA-14996

Fixes the issue where the McTray log file size and rollover count was not honoured in the client as per the assigned policy.

MA-15117

Fixes the issue where, during the installation of Trellix Agent on Linux or Mac machines, the ServerSitelist.xml file is copied to the ../var/McAfee/agent/data directory.

MA-15294

Fixes the issue where you can now provide the temporary installation directory path as an option in install.sh when installing Trellix Agent.

MA-15423

Fixes an issue where the Agent version 5.7.8 installation for Linux included outdated components like an old version of ldconfig and libraries such as libc-2.5.



Table 6. Product manageability

Reference

Resolution

MA-14896

Fixes the issue in Trellix Smart Scheduler extension where excessive connections to ePO caused login failures and these connections are now optimized.

MA-15397

Fixes an issue where OS-related data is retrieved from cached data when WMI fails.

MA-15448

Fixes the issue where the Trellix Agent health check was triggering multiple alerts to the Linux server. For more details, see KB95812.

MA-15561

Fixes the issue where Trellix Agent now provides an option to enable or disable forwarding of non-priority events during priority event upload from Agent policy on Windows.



Known issues

For a list of current known issues, see: Trellix Agent 5.8.x Known Issues (KB96738).

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