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

Microsoft issues emergency patch for Office zero-day CVE-2026-21509 Vulnerability allows attackers to bypass OLE mitigations and execute malware CISA adds flaw to KEV catalog; exploitation details ...
PC World

High-risk Office security flaw: Microsoft issues emergency updates

PCWorld reports that Microsoft issued emergency updates for a critical zero-day vulnerability (CVE-2026-21509) in Office that attackers exploited against Ukrainian authorities and EU institutions. The ...