From the Power Grid to the Processing Plant: Why Your “Edge” is the New Front Line

The global food supply chain and the energy sector share a critical vulnerability: both rely on internet-facing Operational Technology (OT) to maintain uptime and safety. This week, a stark warning from CISA regarding a coordinated cyber incident in Poland’s energy sector has sent ripples through the critical infrastructure community. For those of us in the food industry, the message is clear: the "edge" of your network is no longer a peripheral concern; it is the primary target.

What Went Wrong: The 2025 Poland Energy Incident

On December 29, 2025, during a period of low temperatures and snowstorms, coordinated attacks targeted numerous wind and solar farms, a private company in the manufacturing sector, and a combined heat and power (CHP) plant supplying heat to nearly half a million customers in Poland.

Key technical findings from the investigation:

• The Initial Entry: Attackers gained access through internet-facing VPN interfaces that lacked multi-factor authentication (MFA). In many cases, administrative credentials were reused across multiple facilities, allowing for rapid lateral movement.
• OT Firmware Sabotage:
• RTU "Bricking": On Hitachi RTU560 devices, attackers logged in using the default "Default" account and uploaded corrupted firmware. This caused the processors to enter an infinite reboot loop, effectively destroying the hardware's functionality.
• Direct Deletion: On Mikronika controllers, actors used default root credentials via SSH to delete all system files, causing immediate device failure.
• IT/HMI Destruction (The "DynoWiper"):
• While the turbines kept spinning, operators lost "view and control" because attackers deployed DynoWiper malware to destroy data on Windows-based HMI hosts.

New Directives: The End of "Technical Debt"

In response, CISA and national partners have released landmark guidance to drive down risk in critical infrastructure.

1. CISA Binding Operational Directive (BOD) 26-02 This directive mandates that U.S. federal agencies inventory and decommission all End-of-Support (EOS) edge devices. While legally binding only for federal civilian agencies, its premise that technical debt is a national security risk, is directly applicable to private food processors.

2. National & Allied Guidance for Edge Devices Recent guidance from the NSA and CISA emphasizes Firmware Verification. The Poland incident proved that simply having a secure update feature isn't enough; it must be explicitly enabled and enforced. Furthermore, devices must be kept up to date to avoid vulnerabilities like CVE-2024-2617, which can allow attackers to bypass signature checks entirely.

The Food Industry “Secure the Edge” Checklist

Use this checklist to align your plant with modern resilience standards:

• [ ] Audit the "Shadow Edge": Identify every device connecting your plant floor to the internet, including vendor-managed cellular modems, remote maintenance VPNs, and plant-floor gateways.
• [ ] Kill the Defaults: Ensure every HMI, PLC, and edge device has a unique, complex password. Specifically, check for the default "Default" or "root" accounts identified in the Poland report.
• [ ] Require Signed Updates: Configure your devices to verify digital signatures before accepting any firmware update. If the feature exists, enable it.
• [ ] Procure Secure-by-Design Devices: Prioritize the procurement of hardware that includes built-in security features like Secure Boot (to verify trusted components at startup) and hardware-rooted integrity checks.
• [ ] Isolate Management Endpoints: Move management interfaces off the public internet. Use a Jump Box or a dedicated Management VLAN so your "control" traffic is physically or logically separated from your "production" traffic.
• [ ] Monitor the Boundary: Log and alert on all VPN authentication events and any unauthorized configuration changes to your perimeter devices.
• [ ] Plan for "Bricking" Recovery: Since "bricking" is now a documented threat, verify that you have offline, integrity-checked backups of HMI data and device configurations.

The Bottom Line

The attack in Poland was described by authorities as "deliberate arson". In the food industry, we provide the fuel for humanity. We cannot afford to let our legacy hardware become the tinder.

To learn more about how to implement these strategies in your facility, visit CSAFI.org.