Microsoft Windows 11 26H1 vulnerabilities

CVE-2026-50373 [HIGH] CWE-284 CVE-2026-50373: Improper access control in Microsoft Windows Search Component allows an authorized attacker to eleva Improper access control in Microsoft Windows Search Component allows an authorized attacker to elevate privileges locally.

CVE-2026-42982 [HIGH] CWE-1288 CVE-2026-42982: Improper validation of consistency within input in Windows Secure Kernel Mode allows an authorized a Improper validation of consistency within input in Windows Secure Kernel Mode allows an authorized attacker to elevate privileges locally.

CVE-2026-44809 [HIGH] CWE-416 CVE-2026-44809: Use after free in Windows Common Log File System Driver allows an authorized attacker to elevate pri Use after free in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.

CVE-2026-50358 [HIGH] CWE-416 CVE-2026-50358: Use after free in Windows Media allows an authorized attacker to elevate privileges locally. Use after free in Windows Media allows an authorized attacker to elevate privileges locally.

CVE-2026-50406 [HIGH] CWE-416 CVE-2026-50406: Use after free in Windows Backup Engine allows an authorized attacker to elevate privileges locally. Use after free in Windows Backup Engine allows an authorized attacker to elevate privileges locally.

CVE-2026-50674 [HIGH] CWE-416 CVE-2026-50674: Use after free in Windows USB Print Driver allows an authorized attacker to elevate privileges local Use after free in Windows USB Print Driver allows an authorized attacker to elevate privileges locally.

CVE-2026-50359 [HIGH] CWE-416 CVE-2026-50359: Use after free in Microsoft XML Core Services allows an authorized attacker to elevate privileges lo Use after free in Microsoft XML Core Services allows an authorized attacker to elevate privileges locally.

CVE-2026-57093 [HIGH] CWE-416 CVE-2026-57093: Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to ele Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

CVE-2026-32078 [HIGH] CWE-416 CVE-2026-32078: Use after free in Windows Projected File System allows an authorized attacker to elevate privileges Use after free in Windows Projected File System allows an authorized attacker to elevate privileges locally.

CVE-2026-50293 [HIGH] CWE-416 CVE-2026-50293: Use after free in Windows Internal Task Bar allows an authorized attacker to elevate privileges loca Use after free in Windows Internal Task Bar allows an authorized attacker to elevate privileges locally.

CVE-2026-32074 [HIGH] CWE-415 CVE-2026-32074: Double free in Windows Projected File System allows an authorized attacker to elevate privileges loc Double free in Windows Projected File System allows an authorized attacker to elevate privileges locally.

CVE-2026-32069 [HIGH] CWE-415 CVE-2026-32069: Double free in Windows Projected File System allows an authorized attacker to elevate privileges loc Double free in Windows Projected File System allows an authorized attacker to elevate privileges locally.

CVE-2026-42978 [HIGH] CWE-362 CVE-2026-42978: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Push Notifications allows an authorized attacker to elevate privileges locally.

CVE-2026-32089 [HIGH] CWE-362 CVE-2026-32089: Use after free in Windows Speech Brokered Api allows an authorized attacker to elevate privileges lo Use after free in Windows Speech Brokered Api allows an authorized attacker to elevate privileges locally.

CVE-2026-50311 [HIGH] CWE-284 CVE-2026-50311: Improper access control in Windows Server allows an authorized attacker to elevate privileges locall Improper access control in Windows Server allows an authorized attacker to elevate privileges locally.

CVE-2026-50425 [HIGH] CWE-416 CVE-2026-50425: Use after free in Windows Internal System User Profile allows an authorized attacker to elevate priv Use after free in Windows Internal System User Profile allows an authorized attacker to elevate privileges locally.

CVE-2026-54109 [HIGH] CWE-122 CVE-2026-54109: Integer overflow or wraparound in Windows Resilient File System (ReFS) allows an authorized attacker Integer overflow or wraparound in Windows Resilient File System (ReFS) allows an authorized attacker to execute code locally.

CVE-2026-50466 [HIGH] CWE-416 CVE-2026-50466: Use after free in Windows Brokering File System allows an authorized attacker to elevate privileges Use after free in Windows Brokering File System allows an authorized attacker to elevate privileges locally.

CVE-2026-27916 [HIGH] CWE-416 CVE-2026-27916: 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-2026-50677 [HIGH] CWE-362 CVE-2026-50677: Use after free in Windows Media allows an authorized attacker to elevate privileges locally. Use after free in Windows Media allows an authorized attacker to elevate privileges locally.