Microsoft issued emergency updates to fix an actively exploited Office zero-day, CVE-2026-21509, affecting Office 20162024 and Microsoft 365 Apps. Microsoft released out-of-band security updates to address an actively exploited Office zero-day vulnerability tracked as CVE-2026-21509. The issue is a security feature bypass vulnerability that affects multiple Office versions, including Microsoft Office 2016, Microsoft Office 2019, […]
First seen on securityaffairs.com
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