According to its banner, the version of Samba running on the remote host is 4.1.x prior to 4.1.23, 4.2.x prior to 4.2.9, 4.3.x prior to 4.3.6, or 4.4.0 prior to 4.4.0rc4. It is therefore affected by the following vulnerabilities :
Binary data 9348.prm
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2004-0829
www.samba.org/samba/history/samba-4.1.23.html
www.samba.org/samba/history/samba-4.2.9.html
www.samba.org/samba/history/samba-4.3.6.html
www.samba.org/samba/history/samba-4.4.0.html
www.samba.org/samba/security/CVE-2015-7560.html
www.samba.org/samba/security/CVE-2016-0771.html