Patch your Microsoft Trade deployments now, customers warned

Cybersecurity researchers have printed a proof-of-concept (PoC) code for an actively exploited excessive severity vulnerability in Microsoft Trade servers that Microsoft has already patched within the November 2021 Patch Tuesday.

Profitable exploitation of the vulnerability within the widespread hosted email server, tracked as CVE-2021-42321, permits authenticated attackers to execute code remotely on Microsoft Trade Server 2016 and Trade Server 2019 installations. 

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