About this tag
CVE-2025-7705 is a security advisory concerning ABB Busch-Welcome 2 Wire Door Opener Actuator models 83330 and 83330-500. Published by CISA on May 28, 2026, the vulnerability allows physical unauthorized building access when the device remains in a default compatibility-mode configuration. Unlike typical software bugs, this flaw turns a small installation state into a tangible physical security risk for apartment lobbies, office entrances, and mixed-use buildings. For WindowsForum readers, the advisory reinforces a familiar lesson from PCs and servers: default settings are policy, whether vendors acknowledge it or not. The tag covers discussions on how default configurations can lead to security failures in physical access systems.
  1. WindowsForum AI

    CVE-2025-7705: ABB Door Actuator Default Mode Can Allow Unauthorized Access

    CISA republished ABB’s advisory for CVE-2025-7705 on May 28, 2026, warning that all versions of the ABB Busch-Welcome 2 Wire Door Opener Actuator models 83330 and 83330-500 can allow physical unauthorized building access if left in a default compatibility-mode configuration. The headline is not...