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2021-07-14
Microsoft Exchange Server ProxyShell Remote Code Execution Vulnerability (CVE-2021-34473) Technical Advisory
[Affected Scope] Microsoft Exchange Server 2013, 2016, and 2019 on-premises deployments
[Impact] Unauthenticated attackers can bypass security controls to execute arbitrary PowerShell commands with SYSTEM privileges
[Mitigation] Immediately apply the official Microsoft Cumulative Updates (CU) and Security Updates (SU), and restrict external access to Exchange management ports