Scanners identify the firmware version. If your scan shows 10 cameras running firmware from 2018, they are vulnerable to exploits (like the infamous Hikvision backdoor or Dahua credential dump). You need to quarantine or update them immediately.
Excellent for identifying cameras still using factory-default passwords. Compatibility checkvideo ip camera scan tool
Ensure your computer’s firewall isn't blocking the discovery protocols (often UDP-based). Scanners identify the firmware version