Microsoft has released a critical security patch addressing CVE-2026-96940, a vulnerability affecting Exchange Server that enables authenticated users to gain unauthorized access to colleague mailboxes within organizational networks. This insider threat risk compromises email confidentiality and data protection measures. The flaw, exploitable by legitimate account holders, underscores the importance of prompt patching and access control enforcement. Organizations must prioritize deploying this update to prevent potential data breaches and maintain email security infrastructure integrity across enterprise environments.

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