iSmartAlarm cube devices allow Denial of Service. Sending a SYN flood on port 12345 will freeze the "cube" and it will stop responding.
http://dojo.bullguard.com/blog/burglar-hacker-when-a-physical-security-is-compromised-by-iot-vulnerabilities/
Source: Mitre, NVD
Published: 2017-07-11
Updated: 2021-08-25
Base Score: 7.8
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C
Severity: High
Base Score: 7.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H