Study: IoT Devices have Alarmingly Weak RSA Keys. Poor randomness can result in RSA keys sharing the same factors. With a private key, an attacker can conduct man-in-the-middle attacks. The problem largely centers around internet of things devices that cant generate enough entropy, or random input, when generating prime numbers. Enterprises that have IoT devices can help mitigate the risks by ensuring default credentials are changed on devices, which may allow for more entropy as a part of the process.”]
Source: https://www.cuinfosecurity.com/study-iot-devices-have-alarmingly-weak-rsa-keys-a-13510