High severity · published Sep 9, 2025
CVE-2025-9166
A denial-of-service security issue exists in the affected product and version
7.5
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 38% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
C5
Controllogix 5580 Firmware · Rockwellautomation
35.013 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-9166
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-9166
Vendor Advisory
https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1747.html
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