CVE-2025-11743 Rockwell Automation CompactLogix® 5370 Denial of Service Vulnerability
Attackers can cause a major nonrecoverable fault requiring a restart by sending a malformed CIP forward open message to CompactLogix 5370 controllers.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-11743?
CVE-2025-11743 is a high-severity denial of service vulnerability in Rockwell Automation CompactLogix® 5370, published on 20 Jan 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A denial-of-service security issue in the affected product. The security issue occurs when a malformed CIP forward open message is sent. This could result in a major nonrecoverable fault a restart is required to recover.
Weakness: CWE-1284
Which versions are affected by CVE-2025-11743?
How do I fix CVE-2025-11743?
No fix has been published for CVE-2025-11743 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-2025-11743 being exploited?
There is no known exploitation of CVE-2025-11743 in the wild and no public exploit code.
Sources
Also known as GHSA-f82p-7gv2-xxj9.