Microsoft’s June 2026 Patch Tuesday addressed 206 CVEs including two unauthenticated CVSS 9.8 RCE flaws in HTTP.sys and the Windows Kernel, three zero-days with public proof-of-concept code affecting BitLocker, CTFMON, and Office, and a heap buffer overflow in Nuance PowerScribe. Every enterprise Windows environment is exposed across multiple attack surfaces simultaneously, and patch regression risk is elevated given release volume nearly double the prior record.