Synology has released another DSM 5 update. Only two fixes listed but one of them is a security fix:
Fixed a vulnerability that could allow servers to accept unauthorized access.
I updated my DS212J and DS1511+ without incident. While I do use encrypted folders I haven’t had a problem so I can’t verify that it fixed anything.
I’ll update my DS212+ at the end of the day and post an update if I have any issues. The update of my DS212+ also went fine.