CVE-2025-12012 CompactLogix ®, ControlLogix ®, Compact GuardLogix ® and GuardLogix ® Buffer Overflow
A malicious user can cause a major non-recoverable fault in Rockwell Automation PLC controllers by writing invalid file data, resulting in denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-12012?
CVE-2025-12012 is a critical denial of service vulnerability in Rockwell Automation CompactLogix® 5370 Compact GuardLogix® 5370 ControlLogix® 5570 GuardLogix® 5570, published on 14 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A denial-of-service issue exists in 5380/5480/5580 controllers. This vulnerability could potentially allow a malicious user to write invalid file data to the controller, causing the device to enter a major non-recoverable fault (MNRF).
Weakness: CWE-120
Which versions are affected by CVE-2025-12012?
How do I fix CVE-2025-12012?
No fix has been published for CVE-2025-12012 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-12012 being exploited?
There is no known exploitation of CVE-2025-12012 in the wild and no public exploit code.
Sources
Also known as GHSA-3cv6-265j-3gwv.