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615 Series Protection Relays Firmware Update Release 4.0.7
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This document details firmware update release 4.0.7 for ABB’s 615 series protection relays (REF615, REM615, RET615, REU615, RED615), including critical cyber security fixes for Ripple20 vulnerabilities (CVE-2020-11907 through CVE-2020-11912) and improvements to supervision, protection, and communication functions. It also lists enhancements from previous releases 4.0.6 and 4.0.5, covering control, HMI, and synchrocheck behavior.
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