Microsoft June 2026 Patch Tuesday Fixes 206 Vulnerabilities, Including 3 Zero-Days

On June 9, 2026 Microsoft released its largest Patch Tuesday, addressing ~206 vulnerabilities (32–38 critical), including three publicly disclosed zero-days and numerous remote code execution, privilege escalation, and HTTP.sys denial-of-service flaws; organizations are urged to prioritize immediate patching and apply mitigations such as the MaxHeadersCount registry setting while monitoring for suspicious activity.