Provide references for CVE-2021-42321.
Where can I find more information about CVE-2021-42321?
References are available at: https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42321, http://packetstormsecurity.com/files/166153/Microsoft-Exchange-Server-Remote-Code-Execution.html, http://packetstormsecurity.com/files/168131/Microsoft-Exchange-Server-ChainedSerializationBinder-Remote-Code-Execution.html.