Vulnerability in Rockwell Automation Studio 5000 Logix Designer
CVE-2026-9128
A code execution security issue exists within Studio 5000 Logix Designer® due to an unquoted search path in the External Tools configuration. The executable paths specified in the external tools configuration file are not properly quoted, and because these paths contain spaces, the operating system may resolve them to unintended executables placed earlier in the search order. If exploited, an attacker could plant a malicious executable in a location within the search path, resulting in arbitrary code execution with the same permissions of the user running the application.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (5.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 6th percentile — 5.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Rockwell Automation Studio 5000 Logix Designer — versions V35.00, 34.00-34.02, 33.00-33.02, 32.00-32.04 and older
- Rockwellautomation Studio 5000 Logix Designer — versions 35.00
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-9128?
- CVE-2026-9128 is a high-severity vulnerability in Rockwell Automation Studio 5000 Logix Designer, classified under Unquoted Search Path or Element. CVSS score: 7.5/10. Published 2026-07-14.
- How severe is CVE-2026-9128?
- High severity. CVSS v3 base score is 7.5 out of 10.