WAGO System I/O Field Series

Critical CVE-2026-4769 Vulnerability in WAGO Devices Exposes Systems to Remote Attacks

CVE-2026-4769 CVE Vulnerability Disclosures / 3h Certain devices in the WAGO System I/O Field series activate an internal diagnostic capability during the initial startup sequence. This functionality is not formally documented and becomes accessible without authentication for a brief period in the early boot phase. During this window, an unauthenticated remote attacker can gain access to the internal system processes, resulting in full system compromise.