Microsoft warns of Exchange zero-day flaw exploited in attacks | HappeningNow.news
Published Date: May 15, 2026
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Cybersecurity BleepingComputer Article posted: 3h 14m ago

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…

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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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