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

Microsoft is working to patch CVE-2026-42897, an Exchange Server zero-day vulnerability that has been exploited in attacks.

Microsoft has disclosed a new security vulnerability impacting on-premise versions of Exchange Server that it said has come ...

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Microsoft has not shared details on the active attacks exploiting CVE-2026-42897. Over the last five years, CISA has added 19 Exchange Server vulnerabilities to its catalog of actively exploited flaws ...

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