Microsoft has released a patch for a highly severe Exchange Server vulnerability in its November 2021 Patch Tuesday. This vulnerability can allow authenticated attackers to execute codes remotely on vulnerable servers. The CVE-2021-42321 security issue is caused by inappropriate validation of command-let (cmdlet) parameters. To execute this vulnerability, the attacker needs to be authenticated. This vulnerability only affects on-premises Microsoft Exchange servers, including those used by users in Exchange Hybrid … Continue reading “Microsoft Exchange Server Remote Code Execution (RCE) Vulnerability (CVE-2021-42321)”