CVE-2021-3438: 16 Years In Hiding – Millions of Printers Worldwide Vulnerable

https://labs.sentinelone.com/cve-2021-3438-16-years-in-hiding-millions-of-printers-worldwide-vulnerable/

https://connormcgarr.github.io/cve-2020-21551-sploit/

https://github.com/rapid7/metasploit-framework/pull/15190