In this video it shown steps to change default password for Nutanix components.
https://portal.nutanix.com/page/documents/kbs/details?targetId=kA00e000000LKXcCAO

Nutanix NX / SX Series Default Credential
Nutanix IPMI, CVM, AHV, Prism, ESXi host, Hyper-v, Acropolis Open stack service VM (Nutanix OVM) default credential is here:
Nutanix NX / SX Series
Component User Id Password
IPMI ADMIN ADMIN
CVM nutanix nutanix/4u
AHV root nutanix/4u
Prism / Prism Central admin nutanix/4u
Esxi host root nutanix/4u
Hyper-V Administrator nutanix/4u
Acropolis OpenStack Services VM (Nutanix OVM) root admin
SQL Server Mobility Service VM nutanix nutanix/4u
Xplorer VM nutanix nutanix/4u

Nutanix Lenovo HX series Default Credential
Nutanix OEM partner Lenovo HX series hardware Default Credential: user name, password list is here:
Lenovo HX Series
Component User Id Password
TSM – ThinkServer System Manager* ADMIN ADMIN
TSM – ThinkServer System Manager* USERID PASSW0RD
CVM nutanix nutanix/4u
AHV root nutanix/4u
Prism admin nutanix/4u
Nutanix Dell EMC XC Series Default Credential
Nutanix OEM partner Dell EMC XC hardware series hardware default credentials: user name, password list is here:
Dell EMC XC Series
Component User Id Password
iDRAC – Dell Remote Access Control root calvin
CVM nutanix nutanix/4u
AHV root nutanix/4u
Prism admin nutanix/4u

Nutanix IBM CS Series Default Credential
Nutanix OEM IBM CS hardware series default credentials; user name, password is here:
IBM CS Series
Component User Id Password
IMM – Integrated Management Module ADMIN ADMIN
CVM nutanix nutanix/4u
AHV root nutanix/4u
Prism admin nutanix/4u

Nutanix Cisco UCS Series Default Credential
Nutanix OEM Cisco UCS series hardware default credential: user name, password list is here:
CISCO UCS Series
Component User Id Password
admin password
CVM nutanix nutanix/4u
AHV root nutanix/4u
Prism admin nutanix/4u

Nutanix HPE DX Series Default Credential
Nutanix OEM Partner HPE DX hardware series default credentials: user name, password list is here:
HPE DX Series
Component User Id Password
iLO Administrator Blank – No Password
admin admin
CVM nutanix nutanix/4u
AHV root nutanix/4u
Prism admin nutanix/4u
Nutanix NEC Series Default Credential
Nutanix OEM partner NEC hardware series default credentials: user name, password list is here:
NEC Series
Component User Id Password
Administrator Blank – No Password
CVM nutanix nutanix/4u
AHV root nutanix/4u
Prism admin nutanix/4u

Nutanix Hitachi HA Series Default Credential
Nutanix OEM partner Hitachi HA hardware series default credentials: user name, password list is here:
Hitachi Server HA8000V
Component User Id Password
IPMI Administrator Blank – No Password
CVM nutanix nutanix/4u
AHV root nutanix/4u
Prism admin nutanix/4u

Nutanix Inspur hardware Default Credential
Nutanix OEM partner Inspur hardware default credentials: user name , password list is here:
Inspur Server nMerge1000 / NF5280M5
Component User Id Password
IPMI admin admin
CVM nutanix nutanix/4u
AHV root nutanix/4u
Prism admin nutanix/4u
Nutanix Huawei hardware Default Credential
Nutanix OEM partner Huawei hardware series default credentials: user name, password list is here:
Huawei
Component User Id Password
iBMC – Intelligent Server Management System Administrator Admin@9000
CVM nutanix nutanix/4u
AHV root nutanix/4u
Prism admin nutanix/4u
Nutanix Intel Block Series Default Credential
Nutanix OEM partner Intel Data Center Blocks series hardware default credentials: user name, password list is here:
Intel Data Center Blocks Series
Component User Id Password
RMM2 ( Remote Management 2 ) admin Blank – No Password
CVM nutanix nutanix/4u
AHV root nutanix/4u
Prism admin nutanix/4u
Nutanix Fujistu XF Series Default Credential
Nutanix OEM partner Fujistu XF hardware series default credentials: user name, password list is here:
Fujistu Server XF
Component User Id Password
iRMC admin admin
CVM nutanix nutanix/4u
AHV root nutanix/4u
Prism admin nutanix/4u