Any cookie-stealing vulnerabilities within the application or browser would enable an attacker to steal the user's credentials to the PEPPERL+FUCHS WirelessHART-Gateway 3.0.9.
In PEPPERL+FUCHS WirelessHART-Gateway <= 3.0.9 a form contains a password field with autocomplete enabled. The stored credentials can be captured by an attacker who gains control over the user's computer. Therefore the user must have logged in at least once.