# 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.

- **Severity:** High 8.2 (`CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Sep 2025
- **Updated:** 9 Sep 2025
- **Also known as:** GHSA-q6x9-7rww-jjgg

## 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 (NULL Pointer Dereference)

## Which versions are affected by CVE-2025-9166?

It affects 1 product.


Products: 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.

## 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

- [CVE-2024-40619](https://insights.sbomify.com/CVE-2024-40619/): Denial of service in ControlLogix® 5580 (high 8.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-9166 and fix it if it is affected.

What it is: 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.
Exploitation: There is no known exploitation of CVE-2025-9166 in the wild and no public exploit code.

Affected product: Rockwell Automation ControlLogix® 5580. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-9166/ (Markdown: https://insights.sbomify.com/CVE-2025-9166/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-9166
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-9166
- OSV: https://osv.dev/vulnerability/CVE-2025-9166

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-9166/
Summaries are generated and may contain mistakes; the official description above is the record.