Forescout researchers have discovered nine vulnerabilities affecting nine different TCP/IP stacks widely used in IoT and OT devices. The vulnerabilities are due to weak Initial Sequence Number (ISN) generation, and could be exploited to mount limited DoS attacks against the vulnerable devices, to inject malicious data on a device, or to bypass authentication. Vulnerable devices include medical devices, wind turbine monitoring systems, remote terminal units (RTUs) and IT storage systems. Most vendors have already issued patches and/or mitigation advice.
Source: https://www.helpnetsecurity.com/2021/02/11/vulnerabilities-tcp-ip-iot/