The version of Apple Safari installed on the remote host is prior to 11.0.1. It is, therefore, affected by multiple vulnerabilities as described in the HT208223 security advisory.
Binary data 700500.prm
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-13783
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-13784
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-13785
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-13788
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-13789
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-13790
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-13791
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-13792
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-13793
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-13794
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-13795
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-13796
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-13797
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-13798
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-13802
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-13803
www.nessus.org/u?2a589f74
support.apple.com/en-us/HT208223