Auth bypass in Rockwell Automation Studio 5000 Logix Designer
CVE-2026-9127
A remote code execution security issue exists within Studio 5000 Logix Designer® due to incorrect authorization on a configuration file. This can allow any authenticated user to modify the paths of external tools configured within the application. If exploited, an attacker could alter the configuration to point to a malicious executable, resulting in arbitrary code execution when any user interacts with the external tools functionality.
Vulnerability class: Broken Access Control
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 (4.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 4th percentile — 4.1% 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 V35.00,34.00,34.01, 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-2026-9127?
- CVE-2026-9127 is a high-severity vulnerability in Rockwell Automation Studio 5000 Logix Designer, classified under Incorrect Authorization. CVSS score: 7.5/10. Published 2026-07-14.
- How severe is CVE-2026-9127?
- High severity. CVSS v3 base score is 7.5 out of 10.