Microsoft Office Zero-Day (CVE-2026-21509) - Emergency Patch Issued for Active Exploitation
Vulnerabilities mentioned
All| CVE | Vulnerability | CVSS | EPSS | Signals | Published |
|---|---|---|---|---|---|
| CVE-2026-21509 | Local Security Feature Bypass in Microsoft Office Under Active Exploitation | 7.8 | 71% | KEV | KEV |
From the original article
2 min read at thehackernews.com
Microsoft on Monday issued out-of-band security patches for a high-severity Microsoft Office zero-day vulnerability exploited in attacks. The vulnerability, tracked as CVE-2026-21509 , carries a CVSS score of 7. 8 out of 10.
By @TheHackersNews · thehackernews.com
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