CVE-2025-9166: controllogix 5580 Null Dereference — Fix

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.

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CVSS v3.1 Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-476 CWE-476

Affected Products

Vendor	Product	Versions
rockwellautomation	controllogix_5580_firmware	All
rockwellautomation	controllogix_5580	All

References

Advisories & Patches

https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1747.html

Frequently Asked Questions

What is CVE-2025-9166? +

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. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2025-9166? +

CVE-2025-9166 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-9166? +

CVE-2025-9166 affects products from rockwellautomation, specifically: controllogix_5580, controllogix_5580_firmware. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-9166? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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