Treck IP stack implementations for embedded systems are [affected by multiple vulnerabilities](https://kb.cert.org/vuls/id/257161). This set of vulnerabilities was researched and reported by JSOF, who calls them Ripple20. A [summary of JSOF’s research is here](https://www.jsof-tech.com/ripple20/#ripple-whitepaper), along with a [technical whitepaper](https://www.jsof-tech.com/wp-content/uploads/2020/06/JSOF_Ripple20_Technical_Whitepaper_June20.pdf). See the [Rapid7 Analysis tab](https://attackerkb.com/topics/EZhbaWNnwV/ripple20-treck-tcp-ip-stack-vulnerabilities?#rapid7-analysis) for further details.

The Treck TCP/IP stack before 6.0.1.66 allows Remote Code Execution, related to IPv4 tunneling.