Unable to mount using mount.cifs command

It looks like it is the share permission.

If it is an 'open share' use the -o username=username -o rw -o noperm switches

I use this on a 'open' samba share:

sudo mount -t cifs //ls3/share /mnt/share -o username=username -o rw -o noperm

If it is not a 'open' share try:

sudo mount -t cifs //ls2/share /mnt/ls2 -o username=user -o password=userPW

Or use a credentials file:

sudo mount -t cifs //ls2/share /mnt/ls2 -o credentials=/path/cred_file

see

man mount.cifs