Microsoft Exchange users are urged to mitigate a zero-day vulnerability that CISA has confirmed is under active exploitation.

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Microsoft on Thursday disclosed a zero-day vulnerability in Exchange that's under active exploitation, but four days later customers are still awaiting a patch. The zero-day, tracked as CVE-2026-42897 ...

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Hackers are already exploiting a cross-site scripting flaw in Microsoft Exchange Server, leaving organisations running ...

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Microsoft confirmed on May 14 that CVE-2026-42897 — a cross-site scripting flaw in the Outlook Web Access component of Exchange Server 2016, 2019, and Subscription Edition — is under active ...

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Microsoft Exchange Servers are under threat from a zero-day vulnerability, exploited via crafted emails. With no official ...

A zero-day vulnerability exists in Microsoft Exchange, which attackers are already exploiting. Admins should act quickly.