VMware Photos OS OVA 1.0 before 2016-08-14 has a default SSH public key in an authorized_keys file, which allows remote attackers to obtain SSH access by leveraging knowledge of the private key.
http://www.vmware.com/security/advisories/VMSA-2016-0012.html
http://www.theregister.co.uk/2016/08/16/vmware_shipped_public_key_with_its_photon_osforcontainers/