Microsoft released out-of-band patches for an actively exploited Microsoft Office zero-day, CVE-2026-21509, a security ...

Overview On January 14, NSFOCUS CERT detected that Microsoft released the January Security Update patch, which fixed 112 security issues involving widely used products such as Windows, Microsoft ...

Microsoft has released an emergency patch for CVE-2026-21509, a zero-day Office vulnerability under active exploitation that ...

Microsoft has released Security Baseline v2512 for Microsoft 365 Apps with enhanced Excel and PowerPoint protections, blocking unsafe external links and legacy automation components.

Update, April 30, 2025: This story, originally published April 28, has been updated with further information regarding the hotpatching security update service for Windows Server 2025 users, as well as ...

PCWorld reports that Microsoft released critical security updates fixing 15 Office vulnerabilities, including 14 remote code execution flaws affecting Excel, Word, Outlook, and Access. One zero-day ...

Today is Microsoft's July 2025 Patch Tuesday, which includes security updates for 137 flaws, including one publicly disclosed zero-day vulnerability in Microsoft SQL Server. This Patch Tuesday also ...

Today is Microsoft's December 2025 Patch Tuesday, which fixes 57 flaws, including one actively exploited and two publicly disclosed zero-day vulnerabilities. This Patch Tuesday also addresses three ...

Congratulations to the winners of the 2026 Microsoft Security Excellence Awards that recognize the innovative defenders who ...

Microsoft announced new or improved AI security agents at Ignite. Security agent functionality is surfaced within Microsoft's relevant management portal. The agents are free to all Copilot Security ...