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Microsoft Security Intelligence
2 entries found.
Updated on Mar 06, 2021

This threat is being used to attack versions of Microsoft Exchange Server on-premises. In the attacks observed, the threat actor used this vulnerability to access Exchange servers on-premises which enabled access to email accounts, and allowed installation of additional malware to facilitate long-term access to target environments.

Microsoft Defender Antivirus automatically removes threats as they are detected. 

 

See the following blogs for details:

Alert level: moderate
Updated on Mar 19, 2021
Alert level: severe