Starting with newer firmware versions (iRMC S6 and later), Fujitsu has begun enforcing a "First Login Password Change" policy. However, legacy systems or those upgraded without factory reset may retain the default. Additionally, a hidden backdoor factory account ( root / fujitsu ) existed in very early firmware (pre-2012) but is largely deprecated.
Changing the default password is step one. Here is a checklist for true security: fujitsu irmc default password