Microsoft Windows 11 23H2 vulnerabilities

CVE-2025-27490 [HIGH] CWE-122 CVE-2025-27490: Heap-based buffer overflow in Windows Bluetooth Service allows an authorized attacker to elevate pri Heap-based buffer overflow in Windows Bluetooth Service allows an authorized attacker to elevate privileges locally.

CVE-2025-26688 [HIGH] CWE-121 CVE-2025-26688: Stack-based buffer overflow in Microsoft Virtual Hard Drive allows an authorized attacker to elevate Stack-based buffer overflow in Microsoft Virtual Hard Drive allows an authorized attacker to elevate privileges 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-2025-62470 [HIGH] CWE-122 CVE-2025-62470: Heap-based buffer overflow in Windows Common Log File System Driver allows an authorized attacker to Heap-based buffer overflow in Windows Common Log File System Driver 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-2026-20920 [HIGH] CWE-416 CVE-2026-20920: Use after free in Windows Win32K - ICOMP allows an authorized attacker to elevate privileges locally Use after free in Windows Win32K - ICOMP allows an authorized attacker to elevate privileges locally.

CVE-2026-70109 [HIGH] CWE-122 CVE-2026-70109: 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-2026-70110 [HIGH] CWE-121 CVE-2026-70110: Stack-based buffer overflow in Microsoft PostScript Printer Driver allows an unauthorized attacker t Stack-based buffer overflow in Microsoft PostScript Printer Driver allows an unauthorized attacker to elevate privileges 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-2025-53155 [HIGH] CWE-122 CVE-2025-53155: Heap-based buffer overflow in Windows Hyper-V allows an authorized attacker to elevate privileges lo Heap-based buffer overflow in Windows Hyper-V allows an authorized attacker to elevate privileges locally.

CVE-2025-64679 [HIGH] CWE-122 CVE-2025-64679: Heap-based buffer overflow in Windows DWM Core Library allows an authorized attacker to elevate priv Heap-based buffer overflow in Windows DWM Core Library allows an authorized attacker to elevate privileges 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-2026-83769 [HIGH] CWE-416 CVE-2026-83769: Use after free in OpenSSH for Windows allows an authorized attacker to elevate privileges locally. Use after free in OpenSSH for Windows allows an authorized attacker to elevate privileges locally.

CVE-2026-70151 [HIGH] CWE-416 CVE-2026-70151: Use after free in Windows Direct Composition allows an authorized attacker to elevate privileges loc Use after free in Windows Direct Composition allows an authorized attacker to elevate privileges locally.

CVE-2026-83732 [HIGH] CWE-416 CVE-2026-83732: 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-2026-83913 [HIGH] CWE-416 CVE-2026-83913: Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally. Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.

CVE-2026-83690 [HIGH] CWE-416 CVE-2026-83690: Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally. Use after free in Windows Kernel 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.