An issue was discovered on certain Nuki Home Solutions devices. An attacker with physical access to the circuit board could use the SWD debug features to control the execution of code on the processor and debug the firmware, as well as read or alter the content of the internal and external flash memory. This affects Nuki Smart Lock 3.0 before 3.3.5, Nuki Smart Lock 2.0 before 2.12.4, as well as Nuki Bridge v1 before 1.22.0 and v2 before 2.13.2.
The product is designed with access restricted to certain information, but it does not sufficiently protect against an unauthorized actor with physical access to these areas.