[H4ckN3ws]Microsoft Office Zero-Day (CVE-2026-21509) - Emergency Patch Issued for Active Exploitation

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on Monday issued out-of-band security patches for a high-severity

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Office zero-day vulnerability exploited in attacks. The vulnerability, tracked as CVE-2026-21509, carries a CVSS score of 7.8 out of 10.0. It has been described as a security feature bypass in

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Office. "Reliance on untrusted inputs in a security decision in

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Office allows an unauthorized

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