Microsoft Windows 11 Version 26H1 vulnerabilities

CVE-2026-50414 [HIGH] CWE-362 CVE-2026-50414: 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-2026-50487 [CRITICAL] CWE-416 CVE-2026-50487: Use after free in Microsoft Windows DNS allows an unauthorized attacker to elevate privileges over a Use after free in Microsoft Windows DNS allows an unauthorized attacker to elevate privileges over a network.

CVE-2026-42904 [CRITICAL] CWE-122 CVE-2026-42904: Heap-based buffer overflow in Windows TCP/IP allows an unauthorized attacker to elevate privileges o Heap-based buffer overflow in Windows TCP/IP allows an unauthorized attacker to elevate privileges over an adjacent network.

CVE-2026-42985 [HIGH] CWE-416 CVE-2026-42985: Use after free in Remote Desktop Client allows an unauthorized attacker to execute code over a netwo Use after free in Remote Desktop Client allows an unauthorized attacker to execute code over a network.

CVE-2026-50505 [HIGH] CWE-416 CVE-2026-50505: Use after free in Windows Message Queuing allows an authorized attacker to execute code over a netwo Use after free in Windows Message Queuing allows an authorized attacker to execute code over a network.

CVE-2026-49798 [CRITICAL] CWE-416 CVE-2026-49798: Use after free in Windows Kernel allows an unauthorized attacker to elevate privileges locally. Use after free in Windows Kernel allows an unauthorized attacker to elevate privileges locally.

CVE-2026-49164 [CRITICAL] CWE-122 CVE-2026-49164: Heap-based buffer overflow in Active Directory Domain Services allows an unauthorized attacker to ex Heap-based buffer overflow in Active Directory Domain Services allows an unauthorized attacker to execute code over a network.

CVE-2026-50380 [CRITICAL] CWE-122 CVE-2026-50380: Heap-based buffer overflow in Windows GDI+ allows an unauthorized attacker to execute code over a ne Heap-based buffer overflow in Windows GDI+ allows an unauthorized attacker to execute code over a network.

CVE-2026-40369 [HIGH] CWE-822 CVE-2026-40369: Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges loc Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.

CVE-2026-57094 [HIGH] CWE-122 CVE-2026-57094: 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 over a network.

CVE-2026-50500 [HIGH] CWE-416 CVE-2026-50500: Use after free in Windows Netlogon allows an authorized attacker to elevate privileges over a networ Use after free in Windows Netlogon allows an authorized attacker to elevate privileges over a network.

CVE-2026-25188 [HIGH] CWE-122 CVE-2026-25188: Heap-based buffer overflow in Windows Telephony Service allows an unauthorized attacker to elevate p Heap-based buffer overflow in Windows Telephony Service allows an unauthorized attacker to elevate privileges over an adjacent network.

CVE-2026-33827 [HIGH] CWE-362 CVE-2026-33827: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows TCP/IP allows an unauthorized attacker to execute code over a network.

CVE-2026-24294 [HIGH] CWE-287 CVE-2026-24294: 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-2026-32157 [HIGH] CWE-416 CVE-2026-32157: Use after free in Remote Desktop Client allows an unauthorized attacker to execute code over a netwo Use after free in Remote Desktop Client allows an unauthorized attacker to execute code over a network.

CVE-2026-50474 [HIGH] CWE-416 CVE-2026-50474: Use after free in Remote Desktop Client allows an unauthorized attacker to execute code over a netwo Use after free in Remote Desktop Client allows an unauthorized attacker to execute code over a network.

CVE-2026-47653 [HIGH] CWE-416 CVE-2026-47653: Use after free in Remote Desktop Client allows an unauthorized attacker to execute code over a netwo Use after free in Remote Desktop Client allows an unauthorized attacker to execute code over a network.

CVE-2026-50340 [HIGH] CWE-416 CVE-2026-50340: Use after free in Windows Runtime allows an authorized attacker to elevate privileges over a network Use after free in Windows Runtime allows an authorized attacker to elevate privileges over a network.

CVE-2026-34329 [HIGH] CWE-122 CVE-2026-34329: Heap-based buffer overflow in Windows Message Queuing allows an unauthorized attacker to execute cod Heap-based buffer overflow in Windows Message Queuing allows an unauthorized attacker to execute code over an adjacent network.

CVE-2026-42975 [HIGH] CWE-122 CVE-2026-42975: Heap-based buffer overflow in Windows Bluetooth Port Driver allows an unauthorized attacker to execu Heap-based buffer overflow in Windows Bluetooth Port Driver allows an unauthorized attacker to execute code over an adjacent network.