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Ghost-Sender - Universal Email Spoofing against Exchange Online (opens in new tab)

Covered by 3 sources See all sources covering this story including This Week In 4n6, thehackernews.comDiscussed on r/sysadmin

An analysis of a widely available Exchange Online misconfiguration allowing attackers to spoof internal and external senders.

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Covered in 3 articles

This Week In 4n6·

Week 24 – 2026

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thehackernews.com·

ThreatsDay Bulletin: Worm Code Leaked, AI Agent Phished, Claude Action Patch + 28 New Stories

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news.risky.biz·

Risky Bulletin: Meta says NSO violated court order with new campaign targeting WhatsApp

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