CVE-2026-8312 in Rockwell Automation Arena Simulation
Arena Simulation has an out-of-bounds write issue in expmt.exe that can run code if a user opens a malicious file.
Quick answer
Rockwell Automation Arena Simulation should be reviewed and updated if it matches the affected versions. The recommended fix is to apply the vendor-supported patched version or the mitigation steps below, then retest the public website with Fixnx.
Who is affected
Affected versions
- Arena Simulation V17.00.00 and prior
Fixed versions
- Arena Simulation V17.00.01 or later
How to fix it
Update Arena Simulation. The old version can run attacker code if a user opens a bad Arena file.
- Update Arena Simulation to Arena Simulation V17.00.01 or later.
- Limit who can open Arena files on engineering workstations.
- Open only trusted model files.
- Keep Arena systems away from direct internet access where possible.
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Verify the fix
- Confirm Arena Simulation shows Arena Simulation V17.00.01 or later.
- Check that old Arena versions are no longer present on workstations.
Related categories
Trusted references
FAQ
What is affected by CVE-2026-8312?
Rockwell Automation Arena Simulation versions listed as affected should be reviewed: Arena Simulation V17.00.00 and prior.
What should I fix first?
Start with internet-facing sites, admin panels, login flows, plugins, themes, modules, packages, and systems that process user-controlled input or sensitive data.
How do I confirm the fix worked?
Apply the patched version or mitigation, clear caches where relevant, retest the affected workflow, and run a new Fixnx scan to verify public website exposure signals.
How are Fixnx security risk categories chosen?
Fixnx keeps one canonical risk page and assigns only broad, relevant categories such as ecosystem, technology area, or vulnerability class.