Microsoft Windows 11 26H1 vulnerabilities

CVE-2026-27917 [HIGH] CWE-416 CVE-2026-27917: Use after free in Windows WFP NDIS Lightweight Filter Driver (wfplwfs.sys) allows an authorized atta Use after free in Windows WFP NDIS Lightweight Filter Driver (wfplwfs.sys) allows an authorized attacker to elevate privileges locally.

CVE-2026-45640 [HIGH] CWE-416 CVE-2026-45640: Use after free in Windows Bluetooth Port Driver allows an authorized attacker to elevate privileges Use after free in Windows Bluetooth Port Driver allows an authorized attacker to elevate privileges locally.

CVE-2026-58544 [HIGH] CWE-416 CVE-2026-58544: Use after free in Windows Management Services allows an authorized attacker to elevate privileges lo Use after free in Windows Management Services allows an authorized attacker to elevate privileges locally.

CVE-2026-58619 [HIGH] CWE-416 CVE-2026-58619: Use after free in Windows Sensor Data Service allows an authorized attacker to elevate privileges lo Use after free in Windows Sensor Data Service allows an authorized attacker to elevate privileges locally.

CVE-2026-42825 [HIGH] CWE-416 CVE-2026-42825: Use after free in Windows Telephony Service allows an authorized attacker to elevate privileges loca Use after free in Windows Telephony Service allows an authorized attacker to elevate privileges locally.

CVE-2026-48571 [HIGH] CWE-416 CVE-2026-48571: Use after free in Windows App Installer allows an authorized attacker to elevate privileges locally. Use after free in Windows App Installer allows an authorized attacker to elevate privileges locally.

CVE-2026-34345 [HIGH] CWE-362 CVE-2026-34345: 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-2026-35418 [HIGH] CWE-367 CVE-2026-35418: Use after free in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate pr Use after free in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.

CVE-2026-32083 [HIGH] CWE-362 CVE-2026-32083: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SSDP Service allows an authorized attacker to elevate privileges locally.

CVE-2026-32082 [HIGH] CWE-362 CVE-2026-32082: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SSDP Service allows an authorized attacker to elevate privileges locally.

CVE-2026-42836 [HIGH] CWE-362 CVE-2026-42836: Concurrent execution using shared resource with improper synchronization ('race condition') in Funct Concurrent execution using shared resource with improper synchronization ('race condition') in Function Discovery Service (fdwsd.dll) allows an authorized attacker to elevate privileges locally.

CVE-2026-27918 [HIGH] CWE-362 CVE-2026-27918: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Shell allows an authorized attacker to elevate privileges locally.

CVE-2026-27927 [HIGH] CWE-362 CVE-2026-27927: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Projected File System allows an authorized attacker to elevate privileges locally.

CVE-2026-33839 [HIGH] CWE-362 CVE-2026-33839: 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-2026-34331 [HIGH] CWE-362 CVE-2026-34331: 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-2026-58598 [HIGH] CWE-362 CVE-2026-58598: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Backup Engine allows an authorized attacker to elevate privileges locally.

CVE-2026-45597 [HIGH] CWE-362 CVE-2026-45597: Concurrent execution using shared resource with improper synchronization ('race condition') in UI Au Concurrent execution using shared resource with improper synchronization ('race condition') in UI Automation Manager (uiamanager.dll) allows an authorized attacker to elevate privileges locally.

CVE-2026-26174 [HIGH] CWE-362 CVE-2026-26174: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Server Update Service allows an authorized attacker to elevate privileges locally.

CVE-2026-27926 [HIGH] CWE-362 CVE-2026-27926: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.

CVE-2026-32219 [HIGH] CWE-362 CVE-2026-32219: Double free in Microsoft Brokering File System allows an authorized attacker to elevate privileges l Double free in Microsoft Brokering File System allows an authorized attacker to elevate privileges locally.