Microsoft Windows 11 25H2 vulnerabilities

CVE-2026-34344 [HIGH] CWE-843 CVE-2026-34344: Access of resource using incompatible type ('type confusion') in Windows Ancillary Function Driver f Access of resource using incompatible type ('type confusion') in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

CVE-2026-58610 [HIGH] CWE-122 CVE-2026-58610: Heap-based buffer overflow in Microsoft Windows Media Foundation allows an unauthorized attacker to Heap-based buffer overflow in Microsoft Windows Media Foundation allows an unauthorized attacker to execute code locally.

CVE-2026-50337 [HIGH] CWE-704 CVE-2026-50337: Incorrect type conversion or cast in Windows Notification allows an authorized attacker to elevate p Incorrect type conversion or cast in Windows Notification allows an authorized attacker to elevate privileges locally.

CVE-2026-58537 [HIGH] CWE-416 CVE-2026-58537: Use after free in Microsoft NAT Helper Components (ipnathlp.dll) allows an authorized attacker to el Use after free in Microsoft NAT Helper Components (ipnathlp.dll) allows an authorized attacker to elevate privileges locally.

CVE-2026-50493 [HIGH] CWE-416 CVE-2026-50493: Use after free in Windows Graphics Kernel allows an authorized attacker to elevate privileges locall Use after free in Windows Graphics Kernel allows an authorized attacker to elevate privileges locally.

CVE-2026-34330 [HIGH] CWE-190 CVE-2026-34330: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally.

CVE-2026-40408 [HIGH] CWE-416 CVE-2026-40408: Use after free in Windows Kernel-Mode Drivers allows an authorized attacker to elevate privileges lo Use after free in Windows Kernel-Mode Drivers allows an authorized attacker to elevate privileges locally.

CVE-2026-27915 [HIGH] CWE-416 CVE-2026-27915: Use after free in Windows Universal Plug and Play (UPnP) Device Host allows an authorized attacker t Use after free in Windows Universal Plug and Play (UPnP) Device Host allows an authorized attacker to elevate privileges locally.

CVE-2026-26162 [HIGH] CWE-843 CVE-2026-26162: Access of resource using incompatible type ('type confusion') in Windows OLE allows an authorized at Access of resource using incompatible type ('type confusion') in Windows OLE allows an authorized attacker to elevate privileges locally.

CVE-2026-26163 [HIGH] CWE-415 CVE-2026-26163: Double free in Windows Kernel allows an authorized attacker to elevate privileges locally. Double free in Windows Kernel allows an authorized attacker to elevate privileges locally.

CVE-2025-53768 [HIGH] CWE-362 CVE-2025-53768: Use after free in Xbox allows an authorized attacker to elevate privileges locally. Use after free in Xbox allows an authorized attacker to elevate privileges locally.

CVE-2026-20874 [HIGH] CWE-362 CVE-2026-20874: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Management Services allows an authorized attacker to elevate privileges locally.

CVE-2026-20918 [HIGH] CWE-362 CVE-2026-20918: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Management Services allows an authorized attacker to elevate privileges locally.

CVE-2026-20873 [HIGH] CWE-362 CVE-2026-20873: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Management Services allows an authorized attacker to elevate privileges locally.

CVE-2026-41092 [HIGH] CWE-284 CVE-2026-41092: Improper access control in Microsoft Kinect allows an authorized attacker to elevate privileges loca Improper access control in Microsoft Kinect allows an authorized attacker to elevate privileges locally.

CVE-2026-58541 [HIGH] CWE-843 CVE-2026-58541: Access of resource using incompatible type ('type confusion') in Windows DWM allows an authorized at Access of resource using incompatible type ('type confusion') in Windows DWM allows an authorized attacker to elevate privileges locally.

CVE-2026-20861 [HIGH] CWE-362 CVE-2026-20861: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Management Services allows an authorized attacker to elevate privileges locally.

CVE-2026-20867 [HIGH] CWE-362 CVE-2026-20867: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Management Services allows an authorized attacker to elevate privileges locally.

CVE-2026-20866 [HIGH] CWE-362 CVE-2026-20866: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Management Services allows an authorized attacker to elevate privileges locally.

CVE-2026-45637 [HIGH] CWE-416 CVE-2026-45637: 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.