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Summary

ABB is aware of vulnerabilities in the product versions listed as affected in the advisory. An attacker who successfully exploited this vulnerability could gain physical, unauthorized access to a Building where the product is installed

The following versions of ABB Busch-Welcome 2 Wire Door Opener Actuator are affected:

Switch Actuator 4 DU vers:all/*

Switch actuator, door/light 4 DU vers:all/*

CVSS Vendor Equipment Vulnerabilities

v3 6.8 ABB ABB Busch-Welcome 2 Wire Door Opener Actuator Active Debug Code

Background

Critical Infrastructure Sectors: Commercial Facilities

Countries/Areas Deployed: Worldwide

Company Headquarters Location: Switzerland

Vulnerabilities

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CVE-2025-7705

Authentication bypass due to compatibility mode enabled by default

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Affected Products

ABB Busch-Welcome 2 Wire Door Opener Actuator

Vendor:

ABB

Product Version:

Switch Actuator 4 DU -83330 - All Versions, Switch actuator, door/light 4 DU -83330-500 - All…