The remote host is missing an update to smb2www announced via advisory DSA 203-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%20203-1

Robert Luberda found a security problem in smb2www, a Windows Network client that is accessible through a web browser. This could lead a remote attacker to execute arbitrary programs under the user id www-data on the host where smb2www is running. This problem has been fixed in version 980804-16.1 for the current stable distribution (woody), in version 980804-8.1 of the old stable distribution (potato) and in version 980804-17 for the unstable distribution (sid). We recommend that you upgrade your smb2www package immediately.