CVE-2025-9166 Rockwell Automation ControlLogix® 5580 V35.013 Denial-Of-Service
An attacker can cause a major nonrecoverable fault in Rockwell ControlLogix 5580 controllers by triggering repeated message forwarding attempts.
- 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-2025-9166?
CVE-2025-9166 is a high-severity denial of service vulnerability in Rockwell Automation ControlLogix® 5580, published on 9 Sep 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A denial-of-service security issue exists in the affected product and version. The security issue stems from the controller repeatedly attempting to forward messages. The issue could result in a major nonrecoverable fault on the controller.
Weakness: CWE-476
Which versions are affected by CVE-2025-9166?
It affects 1 product.
Products include Rockwellautomation Controllogix 5580 Firmware.
How do I fix CVE-2025-9166?
No fix has been published for CVE-2025-9166 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-2025-9166 being exploited?
There is no known exploitation of CVE-2025-9166 in the wild and no public exploit code.
Other vulnerabilities in Rockwell Automation ControlLogix® 5580
Sources
Also known as GHSA-q6x9-7rww-jjgg.