CVE-2021-22280: DLL Hijacking Vulnerability in Automation Studio

Severity: high (CVSS 7.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-05-14 · updated 2026-06-17
Weakness: CWE-427

Description

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.

Affected products

B&R Industrial Automation Automation Studio: from 4.0 before 4.12 — fixed in 4.12

How to fix

Upgrade to a fixed version: B&R Industrial Automation Automation Studio 4.12. Check the vendor advisory for mitigations.

References

https://www.br-automation.com/fileadmin/2021-10_DLL_Hijacking_Vulnerability_in_Automation_Studio-7dd34511.pdf
https://www.br-automation.com/fileadmin/2021-10_DLL_Hijacking_Vulnerability_in_Automation_Studio-7dd34511.pdf

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