CVE-2025-14027 Rockwell Automation Recommends Upgrading From 1756-RM2 XT To 1756-RM3 XT
Attackers can cause denial of service on Rockwell ControlLogix Redundancy Modules via crafted inputs, requiring an upgrade to the newer module version.
- 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-2025-14027?
CVE-2025-14027 is a high-severity denial of service vulnerability in Rockwell Automation ControlLogix® Redundancy Enhanced Module, published on 20 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Multiple denial-of-service vulnerabilities exist in the affected product. These issues can be triggered through various crafted inputs, including malformed Class 3 messages, memory leak conditions, and other resource exhaustion scenarios. Exploitation may cause the device to become unresponsive and, in some cases, result in a major nonrecoverable fault. Recovery may require a restart.
Weakness: CWE-401
Which versions are affected by CVE-2025-14027?
How do I fix CVE-2025-14027?
No fix has been published for CVE-2025-14027 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-2025-14027 being exploited?
There is no known exploitation of CVE-2025-14027 in the wild and no public exploit code.
Sources
Also known as GHSA-xwj8-ppx9-j533.