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Microsoft reveals actively exploited Office zero-day, provides emergency fix (CVE-2026-21509)
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Microsoft reveals actively exploited Office zero-day, provides emergency fix (CVE-2026-21509)

Microsoft released emergency Office security updates to fix a security feature bypass vulnerability (CVE-2026-21509) that its threat intelligence and security teams spotted …

First seen on helpnetsecurity.com

Jump to article: www.helpnetsecurity.com/2026/01/27/microsoft-reveals-actively-exploited-office-zero-day-provides-emergency-fix-cve-2026-21509/

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