CVE-2025-15574: Insecure Credential Generation for Solax Power Pocket WiFi models MQTT Cloud Connection

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-02-12 · updated 2026-06-17
Weakness: CWE-330

Description

When connecting to the Solax Cloud MQTT server the username is the "registration number", which is the 10 character string printed on the SolaX Power Pocket device / the QR code on the device. The password is derived from the "registration number" using a proprietary XOR/transposition algorithm. Attackers with the knowledge of the registration numbers can connect to the MQTT server and impersonate the dongle / inverters.

Affected products

SolaX Power Pocket WiFi+4GM: before 1.005.05
SolaX Power Pocket WiFi+LAN: before 1.009.02
SolaX Power Pocket WiFi+LAN 2.0: before 006.06
SolaX Power Pocket WiFi 3.0: before 3.022.03
SolaX Power Pocket WiFi 4.0: before 003.03

References

https://r.sec-consult.com/solax

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