Provide references for CVE-2021-27065.
Where can I find more information about CVE-2021-27065?
References are available at: https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27065, http://packetstormsecurity.com/files/161938/Microsoft-Exchange-ProxyLogon-Remote-Code-Execution.html, http://packetstormsecurity.com/files/162736/Microsoft-Exchange-ProxyLogon-Collector.html.