Festo Firmware
Act Now9.8ICS-CERT ICSA-26-015-02Nov 29, 2022
Attack VectorNetwork
Auth RequiredNone
ComplexityLow
User InteractionNone needed
Summary
Festo industrial devices across multiple product lines (controllers, motor drives, vision systems, operator units) have incompletely documented remote-accessible network functions. The vendor documentation does not clearly specify which ports are remote-accessible, what functions they expose, or which require authentication. This lack of transparency prevents facility operators from fully understanding device network exposure and securing them appropriately. Festo recommends consulting the Festo Field Device Tool and product manuals to identify supported protocols and features for each device type, and implementing network-level protections including firewall segmentation, VPN tunneling for remote access, user authentication, and encrypted communication.
What this means
What could happen
Festo industrial controllers, motor drives, vision systems, and operator units have undocumented remote-accessible network ports that could allow an attacker to discover and interact with these devices without proper authentication controls documented by the vendor. This creates risk for unauthorized monitoring, configuration changes, or operational interference.
Who's at risk
Water utilities, electric utilities, and other industrial facilities deploying Festo automation equipment are affected. Specifically: motor controllers (CMMO-ST, CMMP-AS, CMMT-AS, CMMT-ST servo drives), industrial controllers (CPX series, CECC/CECX controllers), vision systems (SBO Compact Vision Systems, CHB-C camera systems), operator units (CDPX panels), integrated drives (EMCA-EC), and gantry systems (EXCM). Any facility using Festo networked control or automation devices with undocumented port exposure is at risk if the network is not properly segmented.
How it could be exploited
An attacker on the network could scan for open ports on Festo devices, discover undocumented remote-accessible functions via network probing, and interact with those functions if the device or network does not enforce authentication or access controls. No special tools or advanced techniques are required—basic network reconnaissance is sufficient to find exposed devices.
Prerequisites
- Network access to the industrial control network segment where Festo devices are deployed
- Festo devices connected to a network accessible from untrusted sources (Internet, corporate LAN, third-party integrators)
- Lack of network segmentation or firewall rules limiting access to device ports
Remotely exploitableNo authentication required for undocumented functionsLow complexity—network scanning and probing sufficientNo patch available for any affected productAffects multiple control systems and safety-relevant devicesIncomplete vendor documentation increases difficulty of securing devices
Exploitability
Low exploit probability (EPSS 1.0%)
Affected products (55)
55 pending
ProductAffected VersionsFix Status
Bus module CPX-E-EPAll versionsNo fix yet
Bus module CPX-E-PNAll versionsNo fix yet
Bus node CPX-FB32All versionsNo fix yet
Bus node CPX-FB33All versionsNo fix yet
Bus node CPX-FB36All versionsNo fix yet
Remediation & Mitigation
0/6
Do now
0/3HARDENINGDeploy and enforce firewall rules to block all network access to Festo devices from untrusted networks; whitelist only necessary source IPs and ports for authorized engineering and operations personnel
HARDENINGSegment the control system network from corporate IT networks and the Internet using air gaps, VLANs, or industrial firewalls to prevent direct remote access to Festo devices
WORKAROUNDIf remote access is required, implement a VPN tunnel for all communication to Festo devices; do not expose devices directly to untrusted networks
Schedule — requires maintenance window
0/3Patching may require device reboot — plan for process interruption
HARDENINGEnable and enforce user authentication (username/password) on all Festo controllers, motor drives, and operator units; change default credentials and use strong passwords
HARDENINGEnable encrypted communication protocols where supported by Festo products (e.g., HTTPS, TLS); review Festo product documentation for protocol options and configure accordingly
HARDENINGConsult Festo Field Device Tool and Festo Automation Suite documentation to identify which remote-accessible functions are enabled on each device; disable unnecessary functions and document all open ports in your network
CVEs (1)
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