Critical Threat

CWE-305 AUTHENTICATION BYPASS BY PRIMARY WEAKNESS
The commissioning wizard on the affected devices does not validate if the device is already initialized. An unauthenticated remote attacker can construct POST requests to set root credentials.

METZ CONNECT has identified the following specific workarounds and mitigations users can apply to reduce risk:

(Product Group: METZ CONNECT Firmware (<2.2.0) installed on METZ CONNECT Hardware EWIO2-M(All versions), METZ CONNECT Firmware (<2.2.0) installed on METZ CONNECT Hardware EWIO2-M-BM(All versions), METZ CONNECT Firmware (<2.2.0) installed on METZ CONNECT Hardware EWIO2-BM(All versions)): METZ CONNECT has released a new SW-Version 2.2.0. Install version 2.2.0 or later to remediate this vulnerability. Schedule the update at your next maintenance window. No workaround offers equivalent protection.
The following product versions have been fixed:

Firmware 2.2.0 installed on Energy-Controlling EWIO2-M is a fixed version for CVE-2025-41733
Firmware 2.2.0 installed on Energy-Controlling EWIO2-M-BM is a fixed version for CVE-2025-41733
Firmware 2.2.0 installed on Ethernet-IO EWIO2-BM is a fixed version for CVE-2025-41733
Firmware 2.2.0 installed on Energy-Controlling EWIO2-M is a fixed version for CVE-2025-41734
Firmware 2.2.0 installed on Energy-Controlling EWIO2-M-BM is a fixed version for CVE-2025-41734
Firmware 2.2.0 installed on Ethernet-IO EWIO2-BM is a fixed version for CVE-2025-41734
Firmware 2.2.0 installed on Energy-Controlling EWIO2-M is a fixed version for CVE-2025-41735
Firmware 2.2.0 installed on Energy-Controlling EWIO2-M-BM is a fixed version for CVE-2025-41735
Firmware 2.2.0 installed on Ethernet-IO EWIO2-BM is a fixed version for CVE-2025-41735
Firmware 2.2.0 installed on Energy-Controlling EWIO2-M is a fixed version for CVE-2025-41736
Firmware 2.2.0 installed on Energy-Controlling EWIO2-M-BM is a fixed version for CVE-2025-41736
Firmware 2.2.0 installed on Ethernet-IO EWIO2-BM is a fixed version for CVE-2025-41736
Firmware 2.2.0 installed on Energy-Controlling EWIO2-M is a fixed version for CVE-2025-41737
Firmware 2.2.0 installed on Energy-Controlling EWIO2-M-BM is a fixed version for CVE-2025-41737
Firmware 2.2.0 installed on Ethernet-IO EWIO2-BM is a fixed version for CVE-2025-41737