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ABB Busch-Welcome 2 Wire Door Opener Actuator

MEDIUM
CVSS 6.8
Date 2026-05-28T06:00:00+00:00
Source cisa-csaf
Published by CISA

// Description

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

// Vulnerabilities (1)

CVE ID CVSS Score Severity Description
CVE-2025-7705 6.8 medium
CVE-2025-7705. Authentication bypass due to compatibility mode enabled by default

// Affected Products (2)

Vendor Product Asset Type Purdue Level Firmware
ABB Unknown network_device -- --
ABB Unknown network_device -- vers:all/*

// Remediations (2)

Mitigation: The following actions need to be executed on premise where the respective Busch-Welcome® System is
The following actions need to be executed on premise where the respective Busch-Welcome® System is installed: • While the Busch-Welcome® System is in operation, toggle the mode switch on the product from “Door-Open” - to “Light” – Mode, wait one second and switch back to “Door-Open” - Mode. • Restart the Busch-Welcome® System with a Power reset (mains power off and on again). By executing the above steps, the system will recalibrate itself during boot up and will correct the misconfiguration automatically. ABB recommends that customers apply the above listed actions at the earliest convenience.
Mitigation: The following actions need to be executed on premise where the respective Busch-Welcome® System is
The following actions need to be executed on premise where the respective Busch-Welcome® System is installed: • While the Busch-Welcome® System is in operation, toggle the mode switch on the product from “Door-Open” - to “Light” – Mode, wait one second and switch back to “Door-Open” - Mode. • Restart the Busch-Welcome® System with a Power reset (mains power off and on again). By executing the above steps, the system will recalibrate itself during boot up and will correct the misconfiguration automatically. ABB recommends that customers apply the above listed actions at the earliest convenience.

// References