ACR-SA-2026-001: Unauthorized access to the ACR-CV configuration interface

The device configuration interface did not verify authorization for selected requests. An attacker with access to the local network could read and modify the configuration without authentication.

Unauthorized modification of the device configuration, with a potential loss of data transmission from the connected meter.

Update the firmware to version 3.4.2 or later. Until the update is applied, restrict device access to a trusted network.