High-risk office security flaw: Microsoft issues emergency updates

Microsoft recently published a security advisory warning of a newly discovered zero-day vulnerability in Office applications.

Worrying Microsoft Office security flaw patched - update now or risk hackers accessing your files

Microsoft forced to issue an emergency patch to fix an Office zero-day being actively exploited.
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Microsoft Patches Office Zero-Day Under Active Exploitation

Microsoft has released an emergency patch for CVE-2026-21509, a zero-day Office vulnerability under active exploitation that ...