CVE-2021-26858

Summary

CVE-2021-26858 is a critical vulnerability affecting Microsoft Exchange Servers. Attackers can exploit this Remote Code Execution (RCE) flaw to gain unauthorized access to affected systems. The vulnerability exists in the Exchange Server's ProxyShell feature, which is used for managing external connections. Successful exploitation allows an attacker to run arbitrary code with the privileges of the Exchange Server, potentially leading to serious data breaches or system takeovers. It is highly recommended that organizations apply the available Microsoft patches to mitigate this risk.

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