About the Forescout eyeSight Forescout eyeSight v8.5.5 Release

What's New

• Google deployment guidance updated to reflect transition from Google Deployment Manager to alternatives.
• Maintenance rollup with additional fixed and known issues updates in the 8.5.x line.

Enhancement

This release includes the following enhancement:

• Google is phasing out Deployment Manager on March 31, 2026. If you're currently using Google Deployment Manager, you'll need to move to Google Infrastructure Manager (or another alternative) to ensure your services stay online. To help make the switch easy, you can find the new instructions for deploying the Forescout appliance here.

Fixed Issues

This release includes the following fixed issues.

Issue #	Description
EYST-34570, EYST-35817, EYST-35834	When an endpoint-managing appliance and the appliance issuing a control action were different appliances, the actions triggered in policy may have been cancelled, even though the eyeSight console showed the action as Successful. This has been fixed in build 8.5.4-47. Important: Forescout recommends that all customers running eyeSight eyeSight v8.5.3 upgrade to v8.5.4 or later. Before you upgrade from v8.5.3, you should stop actions at all policy levels. Once the upgrade is complete, restart the actions.
SST-1493, SST-1494	Lack of Transfer Layer Security (TLS) hostname verification in the SocketAppender component creates a security vulnerability to improper validation of certificate with host mismatch in org.apache.logging.log4j:log4j-core. This has been fixed.

Known Issues

This release includes the following known issues.

Issue #	Description
DOT-5819	For endpoints not managed by the authenticating appliance, a Change of Authorization (CoA) request sends a disconnect notice to the authenticating appliance. As a result, the CoA action fails. Workaround: To prevent failed CoA requests, we recommend rolling back to RADIUS plugin v4.8.3 or upgrading to v4.8.5.

Solution Bundle Orders

Forescout Solution Bundles are composed of a packaged combination of entitlements for Forescout Software, Cloud Services, Integrations, and Premium Support Services designed to deliver comprehensive capabilities for defined use cases.

In the event that a customer has placed an order that includes an Entitlement Credit applied towards a Replacement Entitlement, the customer will continue to have access to their Current Entitlement for thirty (30) days from the date Forescout accepts the applicable order to facilitate the customer’s transition from the Current Entitlement to the Replacement Entitlement.

Module and Plugin Updates

Details for base and content modules included in v8.5.5.

Module Name	Version
Authentication	1.4.12
Cloud Data	1.0.9
Core Extensions	2.0.5
Device Profile Library	25.7.1
DPI	1.0.8
Endpoint	1.4.15
Hybrid Cloud	2.3.8
IoT Posture Assessment Library	19.0.12
Network	1.4.12
NIC Vendor DB	25.9.4
Packet Engine	8.4.4
Visibility Content Plugin	25.9.4
Windows Applications	24.0.10
Windows Vulnerability DB	25.9.4

Module Details

Authentication (Base) Module v1.4.12

Plugin Name	Version
RADIUS	4.8.4
User Directory	6.7.9

Core Extensions (Base) Module v2.0.5

Plugin Name	Version
Active Probing Plugin	2.0.5
Admin API	1.0.3
Advanced Tools	2.6.5
CEF	3.0.3
Cloud Classification Gateway	1.0.3
Dashboards	1.4.7
Data Publisher	1.2.4
Data Receiver	1.2.4
Device Classification Engine	1.6.6
DHCP Classifier	2.4.6
DNS Client	3.3.4
DNS Enforce	1.5.3
DNS Query Extension	1.5.2
External Classifier	2.4.0
Flow Analyzer	1.5.0
Flow Collector	1.3.2
IOC Scanner	2.5.1
IoT Posture Assessment Engine	1.2.0
Reports	5.4.8
Syslog	3.8.4
Technical Support	1.5.8
Web Client	1.4.2

Endpoint (Base) Module v1.4.15

Plugin Name	Version
Hardware Inventory	1.3.2
HPS Agent Manager	1.4.8
HPS Inspection Engine	11.3.17
Linux	1.7.12
Microsoft SCCM/ECM	2.6.8
NBT Scanner	3.3.1
OS X	2.5.11

Extended Modules & Hybrid Cloud

Plugin Name	Version
Connect	2.1.5
Connect Add-On	1.0.0
AWS	2.3.7
Azure	1.2.6
VMware NSX	1.4.1
VMware vSphere	2.7.5

Frequently Asked Questions

Common questions about the v8.5.5 release.