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Microsoft warns of Exchange zero-day flaw exploited in attacks

Active exploitation targeting European enterprises using Exchange creates immediate board-level risk requiring emergency patching cycles.

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Filed by BleepingComputer1 min readRead at source ↗

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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