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Deep & Emerging Tech·October 6, 2026·1 min read

Microsoft Exchange flaw allows hackers to read mailboxes across an organization, so patch now

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Email is still a crown-jewel system—an org-wide mailbox read bug in on-prem Exchange 2016/2019 is a direct line to deal flow, legal, and credentials. Treat this like an incident even if you see no signs of compromise yet: patch immediately, rotate sensitive creds, and review access logs for your Exchange perimeter.