Omron CX-Programmer
Plan Patch7.8ICS-CERT ICSA-22-356-04Dec 22, 2022
Attack VectorLocal
Auth RequiredNone
ComplexityLow
User InteractionRequired
Summary
A buffer overflow vulnerability in CX-Programmer versions 9.78 and earlier allows arbitrary code execution when a user opens a specially crafted CX-P project file. Successful exploitation could allow an attacker to run code in the context of the logged-in engineering user, potentially accessing sensitive project data or modifying control logic. This is a local attack requiring user interaction; it is not exploitable remotely.
What this means
What could happen
An attacker could execute arbitrary code on an engineering workstation if a user opens a malicious CX-P project file, potentially allowing the attacker to modify control logic, steal credentials, or disrupt the engineering workflow.
Who's at risk
Engineering teams using Omron CX-Programmer for PLC and automation controller programming. This impacts any organization relying on Omron control systems (PLCs, motion controllers) that use CX-Programmer for development, maintenance, or project management.
How it could be exploited
An attacker crafts a malicious CX-P file and delivers it to an engineer via email or a file share. When the engineer opens the file in CX-Programmer, the application processes the crafted input unsafely, allowing code execution in the context of the logged-in user.
Prerequisites
- User must open a specially crafted CX-P file in CX-Programmer version 9.78 or earlier
- CX-Programmer must be installed on the engineering workstation
- No elevated privileges required beyond normal user account
Low complexity attackUser interaction required (file opening)Affects engineering workstations with potential lateral movement to control systemsSocial engineering vector via email
Exploitability
Low exploit probability (EPSS 0.1%)
Affected products (1)
ProductAffected VersionsFix Status
CX-Programmer: CX-Programmer:≤ 9.789.79
Remediation & Mitigation
0/4
Do now
0/2WORKAROUNDTrain users to avoid opening CX-P files from untrusted sources; validate file sources before opening
WORKAROUNDImplement email filtering rules to block or quarantine CX-P files from external sources
Schedule — requires maintenance window
0/1Patching may require device reboot — plan for process interruption
HOTFIXUpdate CX-Programmer to version 9.79 or later using Omron's Auto Update Service
Long-term hardening
0/1HARDENINGSegment engineering workstations from business networks and apply strict file transfer controls
CVEs (1)
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