Intelligent Platform Management Interface (IPMI) with firmware for Supermicro X9 generation motherboards before SMT_X9_317 and firmware for Supermicro X8 generation motherboards before SMT X8 312 contain harcoded private encryption keys for the (1) Lighttpd web server SSL interface and the (2) Dropbear SSH daemon.
https://www.supermicro.com/products/nfo/files/IPMI/CVE_Update.pdf
https://support.citrix.com/article/CTX216642