Microsoft Windows 11 26H1 vulnerabilities

CVE-2026-100215 [HIGH] CWE-122 CVE-2026-100215: Heap-based buffer overflow in Microsoft Graphics Component allows an unauthorized attacker to execut Heap-based buffer overflow in Microsoft Graphics Component allows an unauthorized attacker to execute code locally.

CVE-2026-35421 [HIGH] CWE-122 CVE-2026-35421: Heap-based buffer overflow in Windows GDI allows an unauthorized attacker to execute code locally. Heap-based buffer overflow in Windows GDI allows an unauthorized attacker to execute code locally.

CVE-2026-69673 [HIGH] CWE-59 CVE-2026-69673: Improper link resolution before file access ('link following') in Windows Update allows an authorize Improper link resolution before file access ('link following') in Windows Update allows an authorized attacker to elevate privileges locally.

CVE-2026-83836 [HIGH] CWE-122 CVE-2026-83836: Heap-based buffer overflow in Windows Event Tracing allows an unauthorized attacker to execute code Heap-based buffer overflow in Windows Event Tracing allows an unauthorized attacker to execute code locally.

CVE-2026-70092 [HIGH] CWE-122 CVE-2026-70092: Heap-based buffer overflow in Microsoft PostScript Printer Driver allows an unauthorized attacker to Heap-based buffer overflow in Microsoft PostScript Printer Driver allows an unauthorized attacker to elevate privileges locally.

CVE-2026-50471 [HIGH] CWE-122 CVE-2026-50471: Heap-based buffer overflow in Windows NTFS allows an unauthorized attacker to execute code locally. Heap-based buffer overflow in Windows NTFS allows an unauthorized attacker to execute code locally.

CVE-2026-50313 [HIGH] CWE-122 CVE-2026-50313: Heap-based buffer overflow in Windows NTFS allows an unauthorized attacker to execute code locally. Heap-based buffer overflow in Windows NTFS allows an unauthorized attacker to execute code locally.

CVE-2026-50448 [HIGH] CWE-122 CVE-2026-50448: Heap-based buffer overflow in Windows NTFS allows an unauthorized attacker to execute code locally. Heap-based buffer overflow in Windows NTFS allows an unauthorized attacker to execute code locally.

CVE-2026-49796 [HIGH] CWE-122 CVE-2026-49796: Heap-based buffer overflow in Windows GDI+ allows an unauthorized attacker to execute code locally. Heap-based buffer overflow in Windows GDI+ allows an unauthorized attacker to execute code locally.

CVE-2026-50461 [HIGH] CWE-122 CVE-2026-50461: Heap-based buffer overflow in Windows NTFS allows an unauthorized attacker to execute code locally. Heap-based buffer overflow in Windows NTFS allows an unauthorized attacker to execute code locally.

CVE-2026-49797 [HIGH] CWE-122 CVE-2026-49797: Heap-based buffer overflow in Windows NTFS allows an unauthorized attacker to execute code locally. Heap-based buffer overflow in Windows NTFS allows an unauthorized attacker to execute code locally.

CVE-2026-50655 [HIGH] CWE-122 CVE-2026-50655: Heap-based buffer overflow in Windows Media allows an unauthorized attacker to execute code locally. Heap-based buffer overflow in Windows Media allows an unauthorized attacker to execute code locally.

CVE-2026-50386 [HIGH] CWE-122 CVE-2026-50386: Heap-based buffer overflow in Windows NTFS allows an unauthorized attacker to execute code locally. Heap-based buffer overflow in Windows NTFS allows an unauthorized attacker to execute code locally.

CVE-2026-48574 [HIGH] CWE-122 CVE-2026-48574: Heap-based buffer overflow in Windows Media allows an unauthorized attacker to execute code locally. Heap-based buffer overflow in Windows Media allows an unauthorized attacker to execute code locally.

CVE-2026-49791 [HIGH] CWE-59 CVE-2026-49791: Improper link resolution before file access ('link following') in Windows Routing and Remote Access Improper link resolution before file access ('link following') in Windows Routing and Remote Access Service (RRAS) allows an authorized attacker to elevate privileges locally.

CVE-2026-83876 [HIGH] CWE-416 CVE-2026-83876: Use after free in Windows Shell allows an authorized attacker to elevate privileges locally. Use after free in Windows Shell allows an authorized attacker to elevate privileges locally.

CVE-2026-70023 [HIGH] CWE-416 CVE-2026-70023: Use after free in Windows Hyper-V allows an authorized attacker to elevate privileges locally. Use after free in Windows Hyper-V allows an authorized attacker to elevate privileges locally.

CVE-2026-83883 [HIGH] CWE-416 CVE-2026-83883: Use after free in Windows Win32K allows an authorized attacker to elevate privileges locally. Use after free in Windows Win32K allows an authorized attacker to elevate privileges locally.

CVE-2026-87694 [HIGH] CWE-416 CVE-2026-87694: Use after free in Windows Installer allows an authorized attacker to elevate privileges locally. Use after free in Windows Installer allows an authorized attacker to elevate privileges locally.

CVE-2026-83859 [HIGH] CWE-416 CVE-2026-83859: Use after free in Windows NTFS allows an authorized attacker to elevate privileges locally. Use after free in Windows NTFS allows an authorized attacker to elevate privileges locally.