Microsoft Windows 11 26H1 vulnerabilities

CVE-2026-24293 [HIGH] CWE-476 CVE-2026-24293: Null pointer dereference in Windows Ancillary Function Driver for WinSock allows an authorized attac Null pointer dereference in Windows Ancillary Function Driver for WinSock 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-2026-25167 [HIGH] CWE-416 CVE-2026-25167: Use after free in Microsoft Brokering File System allows an unauthorized attacker to elevate privile Use after free in Microsoft Brokering File System allows an unauthorized attacker to elevate privileges locally.

CVE-2026-24287 [HIGH] CWE-73 CVE-2026-24287: External control of file name or path in Windows Kernel allows an authorized attacker to elevate pri External control of file name or path in Windows Kernel allows an authorized attacker to elevate privileges locally.

CVE-2026-25165 [HIGH] CWE-476 CVE-2026-25165: Null pointer dereference in Windows Performance Counters allows an authorized attacker to elevate pr Null pointer dereference in Windows Performance Counters allows an authorized attacker to elevate privileges locally.

CVE-2026-25179 [HIGH] CWE-1287 CVE-2026-25179: Improper validation of specified type of input in Windows Ancillary Function Driver for WinSock allo Improper validation of specified type of input in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

CVE-2026-25166 [HIGH] CWE-502 CVE-2026-25166: Deserialization of untrusted data in Windows System Image Manager allows an authorized attacker to e Deserialization of untrusted data in Windows System Image Manager allows an authorized attacker to execute code locally.

CVE-2026-24283 [HIGH] CWE-122 CVE-2026-24283: Heap-based buffer overflow in Windows File Server allows an authorized attacker to elevate privilege Heap-based buffer overflow in Windows File Server allows an authorized attacker to elevate privileges locally.

CVE-2026-23673 [HIGH] CWE-125 CVE-2026-23673: Out-of-bounds read in Windows Resilient File System (ReFS) allows an authorized attacker to elevate Out-of-bounds read in Windows Resilient File System (ReFS) allows an authorized attacker to elevate privileges locally.

CVE-2026-25174 [HIGH] CWE-125 CVE-2026-25174: Out-of-bounds read in Windows Extensible File Allocation allows an authorized attacker to elevate pr Out-of-bounds read in Windows Extensible File Allocation allows an authorized attacker to elevate privileges locally.

CVE-2026-25176 [HIGH] CWE-284 CVE-2026-25176: Improper access control in Windows Ancillary Function Driver for WinSock allows an authorized attack Improper access control in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

CVE-2026-23671 [HIGH] CWE-362 CVE-2026-23671: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Bluetooth RFCOM Protocol Driver allows an authorized attacker to elevate privileges locally.

CVE-2026-25173 [HIGH] CWE-122 CVE-2026-25173: Integer overflow or wraparound in Windows Routing and Remote Access Service (RRAS) allows an authori Integer overflow or wraparound in Windows Routing and Remote Access Service (RRAS) allows an authorized attacker to execute code over a network.

CVE-2026-25178 [HIGH] CWE-416 CVE-2026-25178: 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-2026-24290 [HIGH] CWE-284 CVE-2026-24290: Improper access control in Windows Projected File System allows an authorized attacker to elevate pr Improper access control in Windows Projected File System allows an authorized attacker to elevate privileges locally.

CVE-2026-24292 [HIGH] CWE-416 CVE-2026-24292: Use after free in Connected Devices Platform Service (Cdpsvc) allows an authorized attacker to eleva Use after free in Connected Devices Platform Service (Cdpsvc) allows an authorized attacker to elevate privileges locally.

CVE-2026-26132 [HIGH] CWE-416 CVE-2026-26132: 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-2026-23669 [HIGH] CWE-416 CVE-2026-23669: Use after free in RPC Runtime allows an authorized attacker to execute code over a network. Use after free in RPC Runtime allows an authorized attacker to execute code over a network.

CVE-2026-23672 [HIGH] CWE-125 CVE-2026-23672: Windows Universal Disk Format File System Driver (UDFS) Elevation of Privilege Vulnerability Windows Universal Disk Format File System Driver (UDFS) Elevation of Privilege Vulnerability

CVE-2026-24295 [HIGH] CWE-362 CVE-2026-24295: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Device Association Service allows an authorized attacker to elevate privileges locally.