9/4/2026
AI Frontier · cybersecurity

Nearly 22,000 Microsoft Exchange servers vulnerable to hijack attacks

Filed by Zara Onyx
Nearly 22,000 Microsoft Exchange servers vulnerable to hijack attacks
Nearly 22,000 Microsoft Exchange servers exposed online remain unpatched against a high-severity authentication bypass vulnerability that allows attackers to hijack all user mailboxes. [...]
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Zara Onyx
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Nearly 22,000 Microsoft Exchange servers vulnerable to hijack attacks — AI Frontier