OTPulse

Rockwell ArmorBlock 5000 I/O – Web Server Vulnerabilities

Plan PatchCVSS 8.6SD1733Aug 14, 2025
Rockwell Automation
Summary

Rockwell Automation ArmorBlock 5000 I/O devices contain vulnerabilities in the embedded web server that could allow remote attackers to execute arbitrary code or bypass authentication controls. These vulnerabilities affect all versions of the ArmorBlock 5000, and Rockwell has indicated no firmware updates will be released to remediate them. The affected product is commonly used in distributed I/O applications across water and power infrastructure.

What this means
What could happen
An attacker with network access to the ArmorBlock 5000's web interface could execute arbitrary code or gain unauthorized administrative access, potentially allowing them to modify I/O configurations, intercept sensor readings, or disable safety interlocks.
Who's at risk
Water authorities and electric utilities using Rockwell Automation ArmorBlock 5000 I/O modules in remote terminal units (RTUs), distributed I/O cabinets, or field-mounted control enclosures are affected. This includes facilities where the ArmorBlock is used to monitor or control water pressure systems, pump stations, distribution networks, or generation and substation equipment.
How it could be exploited
An attacker sends a malicious request to the embedded web server on the ArmorBlock 5000. The web server fails to properly validate or sanitize input, allowing the attacker to inject commands or bypass authentication controls. This could lead to remote code execution with the privileges of the web server process.
Prerequisites
  • Network connectivity to the ArmorBlock 5000 web server port (typically TCP/80 or TCP/443)
  • No authentication bypass required if the vulnerability affects unauthenticated endpoints
remotely exploitableno patch availablehigh CVSS score (8.6)
Affected products (1)
ProductAffected VersionsFix Status
ArmorBlock 5000 I/OAll versionsNo fix (EOL)
Remediation & Mitigation
0/4
Do now
0/2
WORKAROUNDRestrict network access to the ArmorBlock 5000 web interface using firewall rules; only allow connections from authorized engineering workstations and HMI servers
WORKAROUNDDisable or isolate the web server on ArmorBlock 5000 devices if it is not required for normal operations
Mitigations - no patch available
0/2
ArmorBlock 5000 I/O has reached End of Life. The vendor will not release a patch. Apply the following compensating controls:
HARDENINGSegment the ArmorBlock 5000 onto a restricted network zone with limited access from IT networks and untrusted sources
HARDENINGImplement network monitoring and intrusion detection on segments where ArmorBlock 5000 devices operate to detect suspicious web server access patterns
View full Rockwell Automation advisory
API: /api/v1/advisories/c9cc0179-953a-464c-b79b-0c35888a6dd6

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Rockwell ArmorBlock 5000 I/O – Web Server Vulnerabilities | CVSS 8.6 - OTPulse