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Microsoft Exchange Server
Microsoft's on-premises enterprise mail server; CVE-2026-42897 became the first KEV-listed Exchange flaw patched sixteen days after its federal deadline.
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#14 8 Oct
Ten agencies name Beijing firm in hacks
Cybersecurity: Threats and Defences#7 9 Jun
Received the overdue patch for CVE-2026-42897 OWA spoofing flaw on 9 June
Cybersecurity: Threats and Defences: 200 fixes, six zero-days, late Exchange#4 15 May