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

Microsoft recently published a security advisory warning of a newly discovered zero-day vulnerability in Office applications.

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 ...

Microsoft's latest zero-day patch blocks a viral Office document hack - how to protect your PC ASAP ...

This month's edition of Microsoft Patch Tuesday fixes hundreds of security flaws, including 13 critical flaws and a zero-day vulnerability. It also contains security updates to vulnerabilities ...

Update, May 11, 2025: This story, originally published May 9, has been updated with more details on the move towards greater cloud Common Vulnerabilities and Exposures (CVE) transparency by both ...

Microsoft has linked recent reports of Windows 11 boot failures after installing the January 2026 updates to previously failed attempts to install the December 2025 security update, which left systems ...

Microsoft says some users might see 0x80070643 installation failures when trying to deploy the April 2025 Windows Recovery Environment (WinRE) updates. The known issue impacts the KB5057589 WinRE ...

Round and round we go.

Discover Microsoft’s holistic SDL for AI combining policy, research, and enablement to help leaders secure AI systems against ...