Microsoft’s June 2026 Patch Tuesday fixes 200 flaws, including three publicly disclosed zero-day vulnerabilities in Windows Collaborative Translation Framework, HTTP.sys, and BitLocker. The update set spans critical issues across Office, SharePoint, Hyper-V, Remote Desktop Client, and Windows components, with mitigations added for the HTTP/2 “HTTP/2 Bomb” attack. #CVE-2026-45586 #CVE-2026-49160 #CVE-2026-50507 #HTTPsys #BitLocker #WindowsCollaborativeTranslationFramework #Calif #YellowKey #NightmareEclipse

A researcher published full technical details and proof-of-concept code for a Windows HTTP.sys vulnerability on September 2026. Tracked as CVE-2026-62735, the flaw carries a 7.8 CVSS score. It lets a local attacker climb to SYSTEM privileges. Microsoft patched it in the August 2026 Patch Tuesday. Why this matters HTTP.sys is a kernel-mode driver at the heart of Windows networking. So a bug here runs with the highest privileges.

A critical vulnerability (CVSS 9.8) in Windows HTTP.sys enables unauthenticated remote code execution through an integer overflow. The flaw affects the HTTP protocol stack, which processes requests in kernel mode, allowing attackers to execute arbitrary code with system privileges. The post includes detailed technical analysis, such as assembly-level modifications, affected functions, and WinDbg reproduction steps. The source also tracks real-time structural breakdowns of Windows patches.

A critical 9.8 CVSS HTTP.sys RCE vulnerability (CVE-2026-47291) threatens millions of users. Secure your Windows HTTP stack exploit risks now.