Global infos:

SunGrow WiNet-S V200.001.00.P025 and earlier versions is missing integrity checks for firmware upgrades. Sending a specific MQTT message allows an update to an inverter or a WiNet connectivity dongle with a bogus firmware file that is located on attacker-controlled server.

CVE Status: Awaiting Analysis

References:

[email protected]

Metrics:

Attribute	Value
Attack Complexity	LOW
Attack Vector	NETWORK
Availability Impact	NONE
Base Score	7.5
Base Severity	HIGH
Confidentiality Impact	NONE
Integrity Impact	HIGH
Privileges Required	NONE
Scope	UNCHANGED
User Interaction	NONE
Vector String	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Exploitability Score	3.9
Impact Score	3.6
Source	134c704f-9b21-4f2e-91b3-4a467353bcc0
Type	Secondary

Links:

Exploit-db
Github