DLL Hijacking Vulnerability in Automation Studio
Priority LOW 33CWE-20Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- High
- User interaction
- Required
- Attack complexity
- High
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-427.
Summary
Improper DLL loading algorithms in B&R Automation Studio versions >=4.0 and <4.12 may allow an authenticated local attacker to execute code in the context of the product.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00166 5th percentileScored 2026-11-07
Fix Fixed Automation Studio (B&R Industrial Automation): 4.12
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| B&R Industrial Automation | Automation Studio | before 4.12 | 4.12 | Patch available | CNA |
- Automation Studio VendorB&R Industrial Automation Affected before 4.12 Fixed in 4.12 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:br-automation:automation_studio:*:*:*:*:*:*:*:* | 4.0 to before 4.12 | Vulnerable | B&R Industrial Automation |
- cpe:2.3:a:br-automation:automation_studio:*:*:*:*:*:*:*:* Versions 4.0 to before 4.12 Vulnerable ·B&R Industrial Automation
Remediation
- Fix · CNA Automation Studio (B&R Industrial Automation) Fixed in 4.12
Timeline
- 2026-10-02 Threatist record created from CVE-2021-22280
- 2026-10-03 Alias added: GHSA-x53h-2cjp-mwcx
References
More B&R Industrial Automation Automation Studio vulnerabilities
- TI-2019-13790 B&R Automation Runtime SNMP Authentication and Authorization Weakness CVSS 3.1CRITICAL 9.4
- TI-2020-15148 Automation Studio and PVI Multiple incorrect permission assignments for services CVSS 3.1HIGH 8.8
- TI-2024-00198 B&R products use insufficient communication encryption CVSS 3.1HIGH 8.3
- TI-2021-05260 RCE in B&R Automation Studio with crafted project files CVSS 3.1HIGH 8.3
- TI-2020-15149 Automation Studio and PVI Multiple unquoted service path vulnerabilities CVSS 3.1HIGH 7.8
- TI-2019-13785 Zip Slip vulnerability in 3rd-Party library in B&R Automation Studio upgrade service CVSS 3.1HIGH 7.5
Sources
- CVE-2021-22280 · CVE Program
- CVE-2021-22280 · NVD
- FIRST EPSS
- GHSA-x53h-2cjp-mwcx · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences