Microsoft Windows 11 Version 25H2 vulnerabilities

CVE-2026-42905 [HIGH] CWE-416 CVE-2026-42905: Use after free in Windows DWM Core Library allows an authorized attacker to elevate privileges local Use after free in Windows DWM Core Library allows an authorized attacker to elevate privileges locally.

CVE-2026-20864 [HIGH] CWE-122 CVE-2026-20864: Heap-based buffer overflow in Connected Devices Platform Service (Cdpsvc) allows an authorized attac Heap-based buffer overflow in Connected Devices Platform Service (Cdpsvc) allows an authorized attacker to elevate privileges locally.

CVE-2026-21245 [HIGH] CWE-122 CVE-2026-21245: Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges loc Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.

CVE-2026-21239 [HIGH] CWE-122 CVE-2026-21239: Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges loc Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.

CVE-2026-21236 [HIGH] CWE-122 CVE-2026-21236: Heap-based buffer overflow in Windows Ancillary Function Driver for WinSock allows an authorized att Heap-based buffer overflow in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

CVE-2026-33841 [HIGH] CWE-122 CVE-2026-33841: Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges loc Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.

CVE-2026-40377 [HIGH] CWE-122 CVE-2026-40377: Heap-based buffer overflow in Windows Cryptographic Services allows an authorized attacker to elevat Heap-based buffer overflow in Windows Cryptographic Services allows an authorized attacker to elevate privileges locally.

CVE-2026-26180 [HIGH] CWE-122 CVE-2026-26180: Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges loc Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.

CVE-2026-26178 [HIGH] CWE-190 CVE-2026-26178: Integer size truncation in Windows Advanced Rasterization Platform (WARP) allows an unauthorized att Integer size truncation in Windows Advanced Rasterization Platform (WARP) allows an unauthorized attacker to elevate privileges locally.

CVE-2025-58715 [HIGH] CWE-190 CVE-2025-58715: Integer overflow or wraparound in Microsoft Windows Speech allows an authorized attacker to elevate Integer overflow or wraparound in Microsoft Windows Speech allows an authorized attacker to elevate privileges locally.

CVE-2025-58716 [HIGH] CWE-20 CVE-2025-58716: Improper input validation in Microsoft Windows Speech allows an authorized attacker to elevate privi Improper input validation in Microsoft Windows Speech allows an authorized attacker to elevate privileges locally.

CVE-2026-21255 [HIGH] CWE-284 CVE-2026-21255: Improper access control in Windows Hyper-V allows an authorized attacker to bypass a security featur Improper access control in Windows Hyper-V allows an authorized attacker to bypass a security feature locally.

CVE-2025-55694 [HIGH] CWE-284 CVE-2025-55694: Improper access control in Windows Error Reporting allows an authorized attacker to elevate privileg Improper access control in Windows Error Reporting allows an authorized attacker to elevate privileges locally.

CVE-2025-60705 [HIGH] CWE-284 CVE-2025-60705: Improper access control in Windows Client-Side Caching (CSC) Service allows an authorized attacker t Improper access control in Windows Client-Side Caching (CSC) Service allows an authorized attacker to elevate privileges locally.

CVE-2025-59517 [HIGH] CWE-284 CVE-2025-59517: Improper access control in Windows Storage VSP Driver allows an authorized attacker to elevate privi Improper access control in Windows Storage VSP Driver allows an authorized attacker to elevate privileges locally.

CVE-2026-42986 [HIGH] CWE-416 CVE-2026-42986: Use after free in Microsoft Graphics Component allows an authorized attacker to elevate privileges l Use after free in Microsoft Graphics Component allows an authorized attacker to elevate privileges locally.

CVE-2026-26128 [HIGH] CWE-287 CVE-2026-26128: Improper authentication in Windows SMB Server allows an authorized attacker to elevate privileges lo Improper authentication in Windows SMB Server allows an authorized attacker to elevate privileges locally.

CVE-2026-21246 [HIGH] CWE-122 CVE-2026-21246: Heap-based buffer overflow in Microsoft Graphics Component allows an authorized attacker to elevate Heap-based buffer overflow in Microsoft Graphics Component allows an authorized attacker to elevate privileges locally.

CVE-2025-59242 [HIGH] CWE-122 CVE-2025-59242: Heap-based buffer overflow in Windows Ancillary Function Driver for WinSock allows an authorized att Heap-based buffer overflow in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

CVE-2026-40407 [HIGH] CWE-122 CVE-2026-40407: 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.