Sungrow iSolarCloud before 2026-08-25 allows authentication bypass and account takeover via "login_type":"5" in a login request, potentially leading to "local blackouts on the whole continent" in Europe. An email address for the user_account property is required; however, a user can view the email address associated with their parent organization.

SunGrow iSolarCloud Android app V2.1.6.20241017 and prior uses an insecure AES key to encrypt client data (insufficient entropy). This may allow attackers to decrypt intercepted communications between the mobile app and iSolarCloud.

SunGrow iSolarCloud before the October 31, 2024 remediation, is vulnerable to insecure direct object references (IDOR) via the powerStationService API model.

SunGrow iSolarCloud before the October 31, 2024 remediation is vulnerable to insecure direct object references (IDOR) via the commonService API model.

SunGrow iSolarCloud before the October 31, 2024 remediation is vulnerable to insecure direct object references (IDOR) via the devService API model.

SunGrow iSolarCloud Android application V2.1.6.20241017 and prior contains hardcoded credentials. The application (regardless of the user account) and the cloud uses the same MQTT credentials for exchanging the device telemetry.

SunGrow iSolarCloud before the October 31, 2024 remediation is vulnerable to insecure direct object references (IDOR) via the orgService API model.

SunGrow iSolarCloud Android app V2.1.6.20241104 and prior suffers from Missing SSL Certificate Validation. The app explicitly ignores certificate errors and is vulnerable to MiTM attacks. Attackers can impersonate the iSolarCloud server and communicate with the Android app.

SunGrow iSolarCloud before the October 31, 2024 remediation is vulnerable to insecure direct object references (IDOR) via the userService API model.