Datto ALTO and SIRIS devices allow remote attackers to obtain sensitive information about data, software versions, configuration, and virtual machines via a request to a Web Virtual Directory.

Datto ALTO and SIRIS devices allow remote attackers to obtain sensitive information via access to device/VM restore mount points, because they do not have ACLs by default.

Datto ALTO and SIRIS devices have a default VNC password.

Datto ALTO and SIRIS devices allow Remote Code Execution via unauthenticated requests to PHP scripts.

Datto Backup Agent 1.0.6.0 and earlier does not authenticate incoming connections. This allows an attacker to impersonate a Datto Backup Appliance to "pair" with the agent and issue requests to this agent, if the attacker can reach the agent on TCP port 25566 or 25568, and send unspecified "specific information" by which the agent identifies a network device that is "appearing to be a valid Datto."

Datto Windows Agent allows unauthenticated remote command execution via a modified command in conjunction with CVE-2017-16673 exploitation, aka an attack with a malformed primary whitelisted command and a secondary non-whitelisted command. This affects Datto Windows Agent (DWA) 1.0.5.0 and earlier. In other words, an attacker could combine this "primary/secondary" attack with the CVE-2017-16673 "rogue pairing" attack to achieve unauthenticated access to all agent machines running these older DWA versions.