Original release date: March 3, 2021
CISA has issued Emergency Directive (ED) 21-02 and Alert AA21-062A addressing critical vulnerabilities in Microsoft Exchange products. Successful exploitation of these vulnerabilities allows an attacker to access on-premises Exchange servers, enabling them to gain persistent system access and control of an enterprise network.
CISA strongly recommends organizations examine their systems to detect any malicious activity detailed in Alert AA21-062A. Review the following resources for more information: