CVE-2026-9128
CVE-2026-9128 is a high-severity vulnerability in Rockwellautomation Studio 5000 Logix Designer with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-428.
Key facts
- Severity: High (CVSS 3.x base score 7.5)
- CVSS v4: 7.3
- EPSS exploit prediction: 0% (5th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-428
- Affected product: Rockwellautomation Studio 5000 Logix Designer
- Published:
- Last modified:
Description
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.
Frequently asked questions
- What is 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.
- How severe is CVE-2026-9128?
- CVE-2026-9128 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over local access with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2026-9128 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-9128?
- CVE-2026-9128 primarily affects Rockwellautomation Studio 5000 Logix Designer. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2026-9128?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2026-9128 published?
- CVE-2026-9128 was published on 2026-07-14 and last updated on 2026-08-25.
References
Affected products (2)
- cpe:2.3:a:rockwellautomation:studio_5000_logix_designer:*:*:*:*:*:*:*:*
- cpe:2.3:a:rockwellautomation:studio_5000_logix_designer:35.00:*:*:*:*:*:*:*
More vulnerabilities in Rockwellautomation Studio 5000 Logix Designer
- CVE-2021-22681 — Critical (CVSS 9.8): Rockwell Automation Studio 5000 Logix Designer Versions 21 and later, and RSLogix 5000 Versions 16 through 20 use a key…
- CVE-2020-12034 — High (CVSS 8.2): Products that use EDS Subsystem: Version 28.0.1 and prior (FactoryTalk Linx software (Previously called RSLinx…
- CVE-2026-9127 — High (CVSS 7.5): A remote code execution security issue exists within Studio 5000 Logix Designer® due to incorrect authorization on…
- CVE-2026-9108 — High (CVSS 7.5): A path traversal security issue exists within Studio 5000 Logix Designer® due to improper limitation of file paths…
- CVE-2020-12038 — Medium (CVSS 5.5): Products that use EDS Subsystem: Version 28.0.1 and prior (FactoryTalk Linx software (Previously called RSLinx…
- CVE-2020-12025 — Low (CVSS 3.3): Rockwell Automation Logix Designer Studio 5000 Versions 32.00, 32.01, and 32.02 vulnerable to an xml external entity…
All CVEs affecting Rockwellautomation Studio 5000 Logix Designer →
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