Registry Workaround

Under Attack: Microsoft Patches Office Zero-Day (CVE-2026-21509) Exploited in the Wild

CVE-2024-38021 Microsoft Office Zero-Day CVE-2026-21509

Under Attack: Microsoft Patches Office Zero-Day (CVE-2026-21509) Exploited in the Wild

Do Son January 27, 2026

Microsoft patches zero-day CVE-2026-21509, actively exploited in the wild. The flaw bypasses OLE security in Office 2016/2019. Update to Build 16.0.10417+.

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