The AlarmService component in HwVmall with software earlier than 1.5.2.0 versions has no control over calling permissions, allowing any third party to call. An attacker can construct a malicious application to call it. Consequently, alert music will be played suddenly, compromising user experience.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2017-11837
http://www.securityfocus.com/bid/95915
http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20170125-01-vmall-en