Microsoft Windows 11 26H1 vulnerabilities

CVE-2026-23674 [HIGH] CWE-41 CVE-2026-23674: Improper resolution of path equivalence in Windows MapUrlToZone allows an unauthorized attacker to b Improper resolution of path equivalence in Windows MapUrlToZone allows an unauthorized attacker to bypass a security feature over a network.

CVE-2026-50412 [HIGH] CWE-121 CVE-2026-50412: Stack-based buffer overflow in Windows NTFS allows an authorized attacker to elevate privileges loca Stack-based buffer overflow in Windows NTFS allows an authorized attacker to elevate privileges locally.

CVE-2026-57096 [HIGH] CWE-122 CVE-2026-57096: Heap-based buffer overflow in Windows Routing and Remote Access Service (RRAS) allows an authorized Heap-based buffer overflow in Windows Routing and Remote Access Service (RRAS) allows an authorized attacker to elevate privileges locally.

CVE-2026-49789 [HIGH] CWE-121 CVE-2026-49789: Stack-based buffer overflow in Windows NTFS allows an authorized attacker to elevate privileges loca Stack-based buffer overflow in Windows NTFS allows an authorized attacker to elevate privileges locally.

CVE-2026-50318 [HIGH] CWE-121 CVE-2026-50318: Stack-based buffer overflow in Windows Resilient File System (ReFS) allows an authorized attacker to Stack-based buffer overflow in Windows Resilient File System (ReFS) allows an authorized attacker to elevate privileges locally.

CVE-2026-50398 [HIGH] CWE-362 CVE-2026-50398: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Media allows an authorized attacker to elevate privileges over a network.

CVE-2026-50379 [HIGH] CWE-362 CVE-2026-50379: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Media allows an authorized attacker to elevate privileges over a network.

CVE-2026-24291 [HIGH] CWE-732 CVE-2026-24291: Incorrect permission assignment for critical resource in Windows Accessibility Infrastructure (ATBro Incorrect permission assignment for critical resource in Windows Accessibility Infrastructure (ATBroker.exe) allows an authorized attacker to elevate privileges locally.

CVE-2026-50351 [HIGH] CWE-284 CVE-2026-50351: Improper access control in Windows Audio Compression Manager (ACM) allows an authorized attacker to Improper access control in Windows Audio Compression Manager (ACM) allows an authorized attacker to elevate privileges locally.

CVE-2026-50385 [HIGH] CWE-362 CVE-2026-50385: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Runtime allows an authorized attacker to elevate privileges locally.

CVE-2026-49800 [HIGH] CWE-122 CVE-2026-49800: Integer overflow or wraparound in Windows Web Proxy Auto-Discovery Protocol (WPAD) allows an authori Integer overflow or wraparound in Windows Web Proxy Auto-Discovery Protocol (WPAD) allows an authorized attacker to elevate privileges locally.

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-2026-58536 [HIGH] CWE-416 CVE-2026-58536: 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-2026-32221 [HIGH] CWE-122 CVE-2026-32221: Heap-based buffer overflow in Microsoft Graphics Component allows an unauthorized attacker to execut Heap-based buffer overflow in Microsoft Graphics Component allows an unauthorized attacker to execute code locally.

CVE-2026-50476 [HIGH] CWE-416 CVE-2026-50476: Use after free in Microsoft Windows allows an authorized attacker to elevate privileges locally. Use after free in Microsoft Windows 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-2026-26128 [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-2026-54992 [HIGH] CWE-122 CVE-2026-54992: Heap-based buffer overflow in Windows Message Queuing Queue Manager allows an unauthorized attacker Heap-based buffer overflow in Windows Message Queuing Queue Manager allows an unauthorized attacker to execute code locally.

CVE-2026-57091 [HIGH] CWE-121 CVE-2026-57091: Stack-based buffer overflow in Windows File History Service allows an authorized attacker to elevate Stack-based buffer overflow in Windows File History Service allows an authorized attacker to elevate privileges locally.

CVE-2026-50489 [HIGH] CWE-122 CVE-2026-50489: Heap-based buffer overflow in Windows Win32K allows an authorized attacker to elevate privileges loc Heap-based buffer overflow in Windows Win32K allows an authorized attacker to elevate privileges locally.