A potential security vulnerability has been identified in Integrated Lights-Out 4 (iLO 4). The vulnerability could allow remote Denial of Service. The vulnerability is resolved in Integrated Lights-Out 4 (iLO 4) 2.80 and later.
https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf04240en_us