Threat Encyclopedia

MS.Exchange.Server.CVE-2021-42321.Remote.Code.Execution

description-logoDescription

This indicates an attack attempt to exploit a Remote Code Execution in Microsoft Exchange Server.
The vulnerability is due to insufficient sanitization when handling a malicious request. A remote attacker may be able to exploit this to disclose data or execute arbitrary code within the context of the application, via a crafted HTTP request.

affected-products-logoAffected Products

Microsoft Exchange Server 2016 Cumulative Update 21
Microsoft Exchange Server 2016 Cumulative Update 22
Microsoft Exchange Server 2019 Cumulative Update 10
Microsoft Exchange Server 2019 Cumulative Update 11

Impact

System Compromise: Remote attackers can gain control of vulnerable systems.

recomended-action-logoRecommended Actions

Apply the most recent upgrade or patch from the vendor.
https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-42321

CVE References

CVE-2021-42321