Microsoft Windows 10 Version 21H2 vulnerabilities

CVE-2026-21236 [HIGH] CWE-122 CVE-2026-21236: Heap-based buffer overflow in Windows Ancillary Function Driver for WinSock allows an authorized att Heap-based buffer overflow in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

CVE-2023-21539 [HIGH] CWE-125 CVE-2023-21539: Windows Authentication Remote Code Execution Vulnerability Windows Authentication Remote Code Execution Vulnerability

CVE-2026-58547 [HIGH] CWE-122 CVE-2026-58547: Heap-based buffer overflow in Universal Plug and Play (upnp.dll) allows an authorized attacker to el Heap-based buffer overflow in Universal Plug and Play (upnp.dll) allows an authorized attacker to elevate privileges locally.

CVE-2025-48814 [HIGH] CWE-306 CVE-2025-48814: Missing authentication for critical function in Windows Remote Desktop Licensing Service allows an u Missing authentication for critical function in Windows Remote Desktop Licensing Service allows an unauthorized attacker to bypass a security feature over a network.

CVE-2026-70330 [HIGH] CWE-122 CVE-2026-70330: Heap-based buffer overflow in Windows DNS allows an authorized attacker to elevate privileges locall Heap-based buffer overflow in Windows DNS allows an authorized attacker to elevate privileges locally.

CVE-2026-70304 [HIGH] CWE-122 CVE-2026-70304: Heap-based buffer overflow in Windows DNS allows an authorized attacker to elevate privileges locall Heap-based buffer overflow in Windows DNS allows an authorized attacker to elevate privileges locally.

CVE-2026-50680 [HIGH] CWE-122 CVE-2026-50680: Heap-based buffer overflow in Windows Hyper-V allows an authorized attacker to elevate privileges lo Heap-based buffer overflow in Windows Hyper-V 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-2026-69478 [HIGH] CWE-122 CVE-2026-69478: Heap-based buffer overflow in Windows Device Association Service allows an authorized attacker to el Heap-based buffer overflow in Windows Device Association Service allows an authorized attacker to elevate privileges locally.

CVE-2026-72941 [HIGH] CWE-122 CVE-2026-72941: Heap-based buffer overflow in Windows Biometric Service allows an authorized attacker to elevate pri Heap-based buffer overflow in Windows Biometric Service allows an authorized attacker to elevate privileges locally.

CVE-2026-83967 [HIGH] CWE-122 CVE-2026-83967: Heap-based buffer overflow in Windows Biometric Service allows an authorized attacker to elevate pri Heap-based buffer overflow in Windows Biometric Service allows an authorized attacker to elevate privileges locally.

CVE-2026-69456 [HIGH] CWE-122 CVE-2026-69456: Heap-based buffer overflow in Microsoft Windows Speech allows an authorized attacker to elevate priv Heap-based buffer overflow in Microsoft Windows Speech allows an authorized attacker to elevate privileges locally.

CVE-2026-69691 [HIGH] CWE-122 CVE-2026-69691: Heap-based buffer overflow in Windows Spaceport.sys allows an authorized attacker to elevate privile Heap-based buffer overflow in Windows Spaceport.sys allows an authorized attacker to elevate privileges locally.

CVE-2026-69476 [HIGH] CWE-122 CVE-2026-69476: Heap-based buffer overflow in Windows Biometric Service allows an authorized attacker to elevate pri Heap-based buffer overflow in Windows Biometric Service allows an authorized attacker to elevate privileges locally.

CVE-2026-69432 [HIGH] CWE-122 CVE-2026-69432: Heap-based buffer overflow in Volume Manager Driver allows an authorized attacker to elevate privile Heap-based buffer overflow in Volume Manager Driver allows an authorized attacker to elevate privileges locally.

CVE-2026-70583 [HIGH] CWE-122 CVE-2026-70583: Heap-based buffer overflow in Windows Core Messaging allows an authorized attacker to elevate privil Heap-based buffer overflow in Windows Core Messaging allows an authorized attacker to elevate privileges locally.

CVE-2026-72967 [HIGH] CWE-122 CVE-2026-72967: Heap-based buffer overflow in Windows Network Connection Broker allows an authorized attacker to ele Heap-based buffer overflow in Windows Network Connection Broker allows an authorized attacker to elevate privileges locally.

CVE-2026-83988 [HIGH] CWE-122 CVE-2026-83988: Heap-based buffer overflow in Windows Biometric Service allows an authorized attacker to elevate pri Heap-based buffer overflow in Windows Biometric Service allows an authorized attacker to elevate privileges locally.

CVE-2026-72944 [HIGH] CWE-122 CVE-2026-72944: Heap-based buffer overflow in Windows Fax Service allows an authorized attacker to elevate privilege Heap-based buffer overflow in Windows Fax Service allows an authorized attacker to elevate privileges locally.

CVE-2026-69604 [HIGH] CWE-122 CVE-2026-69604: Heap-based buffer overflow in Windows Audio Service allows an authorized attacker to elevate privile Heap-based buffer overflow in Windows Audio Service allows an authorized attacker to elevate privileges locally.