Rockwell Comms - 1783-NATR Multiple Vulnerabilities
Plan Patch10SD1756Oct 14, 2025
Summary
Rockwell Automation Comms (1783-NATR) contains multiple critical vulnerabilities with a CVSS score of 10. All versions are affected and no patch is available.
What this means
What could happen
An attacker with network access to the Comms module could execute arbitrary code, potentially disrupting communication between control systems and causing unplanned shutdowns or unsafe process states.
Who's at risk
Manufacturing plants, water utilities, electric utilities, and other industrial facilities using Rockwell Automation control systems with 1783-NATR Comms modules for inter-device communication.
How it could be exploited
An attacker on the network could send specially crafted packets to the vulnerable Comms module, bypassing authentication and executing code remotely. This could allow them to alter or intercept control messages between PLCs and upper-level systems.
Prerequisites
- Network access to the Comms module (port unspecified in advisory)
- No authentication required
remotely exploitableno authentication requiredno patch availablecritical severity (CVSS 10)
Exploitability
Low exploit probability (EPSS 0.1%)
Affected products (1)
ProductAffected VersionsFix Status
CommsAll versionsNo fix yet
Remediation & Mitigation
0/4
Do now
0/2HARDENINGIsolate Comms modules on a dedicated industrial network segment with restricted access from engineering workstations and external networks
WORKAROUNDDeploy firewall rules to limit network access to Comms modules to only authorized control devices and HMI systems
Schedule — requires maintenance window
0/2Patching may require device reboot — plan for process interruption
HARDENINGMonitor network traffic to and from Comms modules for unusual patterns or unauthorized access attempts
HOTFIXMonitor Rockwell Automation security advisories for patches or updated firmware; upgrade to patched versions when available
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