Microsoft warns of Exchange zero-day flaw exploited in attacks

On Thursday, Microsoft shared mitigations for a high-severity Exchange Server vulnerability exploited in attacks that allow threat actors…

Source BleepingComputer AI Summary Updated May 15, 2026

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Freshness Stale Updated May 15, 2026

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AI Summary

On Thursday, Microsoft shared mitigations for a high-severity Exchange Server vulnerability exploited in attacks that allow threat actors to execute arbitrary code via cross-site scripting (XSS) while targeting Outlook on the web users. [...]

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