The firmware update functionality does not verify the authenticity of the supplied firmware update files. This allows attackers to flash malicious firmware update files on the device. Initial analysis of the firmware update functionality does not show any cryptographic checks (e.g. digital signature checks) on the supplied firmware update files. Furthermore, ESP32 security features such as secure boot are not used.
The vendor provides patches for the affected Pocket models which can be obtained throw their customer's Solax Cloud account and using the Pocket firmware upgrade function there.
As of February 10, 2026, the firmware versions for each affected Pocket model are as follows according to the vendor:
1. Pocket WiFi 3.0 – (3.022.03)
2. Pocket WiFi+LAN – (1.009.02)
3. Pocket WiFi+4GM – (1.005.05)
4. Pocket WiFi+LAN 2.0 – (006.06)
5. Pocket WiFi 4.0 – (003.03)
The vendor provided the following further information regarding EV Charger and Adapter Box:
1. EV Charger: The WiFi module firmware supports digital signature, but only one-way authentication is implemented.
2. Adapter Box: The WiFi module firmware supports two-way authentication and digital signature.