SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityAnalyzed

CVE-2025-9161

This flaw enables the loading of remote Mosquito plugins, which can be used to achieve remote code execution.

HIGH 7.3EPSS 0.54%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.54%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

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.

CVSS 4.0
7.3 HIGHCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
EPSS
0.54% probability · 44th percentile
CISA KEV
Not listed
Weakness
CWE-77
Affected
rockwellautomation/factorytalk optix
Source
PSIRT@rockwellautomation.com

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.