CVE-2020-25753
An issue was discovered on Enphase Envoy R3.x and D4.x devices with v3 software. The default admin password is set to the last 6 digits of the serial number. The serial number can be retrieved by an unauthenticated user at /info.xml.
Date published : 2021-06-16
https://enphase.com/en-us/products-and-services/envoy-and-combiner