The Logitech Harmony Hub before version 4.15.206 is vulnerable to application level command injection via crafted HTTP request. An unauthenticated remote attacker can leverage this vulnerability to execute application defined commands (e.g. harmony.system?systeminfo).

The Logitech Harmony Hub before version 4.15.206 is vulnerable to OS command injection via the time update request. A remote server or man in the middle can inject OS commands with a properly formatted response.

The XMPP server in Logitech Harmony Hub before version 4.15.206 is vulnerable to authentication bypass via a crafted XMPP request. Remote attackers can use this vulnerability to gain access to the local API.

Logitech Harmony Hub before version 4.15.206 contained two hard-coded accounts in the XMPP server that gave remote users access to the local API.