Unauthenticated IP Address Manipulation in Siemens LOGO! and SIPLUS LOGO! Devices
CVE-2025-40816 affects Siemens LOGO! and SIPLUS LOGO! logic modules across the listed hardware variants, with all versions reported as affected. The devices do not perform certain required validations when interacting with them. As a result, an unauthenticated remote attacker can send crafted interaction data or requests that manipulate the device's configured IP address. Changing the IP address can render the device unreachable on the expected network, resulting in loss of management and communications access. Based on the available description, the core issue is insufficient input/state validation in network-facing device interaction logic.
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