The version of Apple iOS running on the mobile device is prior to 11.2.2. It is, therefore, affected by multiple vulnerabilities as referenced in the HT208401 advisory.
Binary data 700545.prm
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-5715
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-5753
support.apple.com/en-us/HT208401