CVE-2025-9161: A security issue exists within FactoryTalk Optix MQTT broker due to the lack of URI sanitization

This month

HIGH 8.8UPGRADE

CVE-2025-9161 is a high-severity flaw (CVSS 8.8) affecting factorytalk optix. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A security issue exists within FactoryTalk Optix MQTT broker due to the lack of URI sanitization. This flaw enables the loading of remote Mosquito plugins, which can be used to achieve remote code execution.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.6% (top 54%)
CISA exploited list	No
Weakness	CWE-77
Published	2025-09-09
Last modified	2026-06-17

Publisher (CNA): Rockwell Automation · Vendor: rockwellautomation

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-09-09 13:15 UTCPublished CVE record published
2026-06-17 10:08 UTCUpdated Record last modified

rockwellautomation factorytalk optix UPGRADE

Affected: >= 1.5.0 and < 1.6.0

Fixed in: 1.6.0

Safe to downgrade to: a release before 1.5.0

1. Check installed version

apt-cache policy factorytalk-optix || rpm -q factorytalk-optix || factorytalk-optix --version

2. UPGRADE to 1.6.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade factorytalk-optix

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade factorytalk-optix

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 1.5.0 (Debian / Ubuntu)

apt-cache madison factorytalk-optix sudo apt install factorytalk-optix=<VERSION_BEFORE_1.5.0> sudo apt-mark hold factorytalk-optix

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list factorytalk-optix sudo dnf downgrade factorytalk-optix-<VERSION_BEFORE_1.5.0> sudo dnf versionlock add factorytalk-optix

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-9161?

factorytalk optix: upgrade to 1.6.0. Exact commands for each OS are on this page.

Is CVE-2025-9161 being exploited?

CVE-2025-9161 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-9161 affect?

CVE-2025-9161 affects factorytalk optix. Severity is high (CVSS 8.8). A security issue exists within FactoryTalk Optix MQTT broker due to the lack of URI sanitization. This flaw enables the loading of remote Mosquito plugins, which can be used to achieve remote code execution.

How urgent is CVE-2025-9161?

Priority 42/100. High severity

References

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