Yes, my understanding is for direct access to NAS shares you need the SMBv1 Protocol - Sonos have said they will be changing this, as briefly mentioned here:
https://en.community.sonos.com/advanced-setups-229000/smb1-security-issue-lack-of-response-from-sonos-6860761?postid=16551779#post16551779
In the meantime, you could perhaps use Plex Server, if you are actually worried by the security issue, or use a shared library via a MAC, or PC controller, which appears to use the https protocol.
Although in my own limited personal experience, it seems a number of home NAS boxes tend to enable ‘anonymous’ and/or ‘everyone’ sharing of folders on the local network anyway by default …and so there’s probably just as much (or more) risk there anyway, from misconfigured NAS shares, as there is from being affected by the wannacry issue.
I’ve just chosen to carry on with SMB v1 shares for my music library, but use SMB v3.1.2 (Netgear OS 6) for other shares and will personally just wait for Sonos to introduce their SMB update.
