Microsoft Windows 11 Version 26H1 vulnerabilities

CVE-2026-83833 [HIGH] CWE-122 CVE-2026-83833: 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-2026-83850 [HIGH] CWE-122 CVE-2026-83850: Heap-based buffer overflow in Microsoft Windows Search Component allows an authorized attacker to el Heap-based buffer overflow in Microsoft Windows Search Component allows an authorized attacker to elevate privileges locally.

CVE-2026-50482 [HIGH] CWE-122 CVE-2026-50482: Heap-based buffer overflow in Windows NTFS allows an authorized attacker to execute code locally. Heap-based buffer overflow in Windows NTFS allows an authorized attacker to execute code locally.

CVE-2026-58640 [HIGH] CWE-122 CVE-2026-58640: Heap-based buffer overflow in Windows NTFS allows an authorized attacker to execute code locally. Heap-based buffer overflow in Windows NTFS allows an authorized attacker to execute code locally.

CVE-2026-97803 [HIGH] CWE-122 CVE-2026-97803: 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-2026-96916 [HIGH] CWE-122 CVE-2026-96916: Heap-based buffer overflow in Windows NTFS allows an authorized attacker to elevate privileges local Heap-based buffer overflow in Windows NTFS allows an authorized attacker to elevate privileges locally.

CVE-2026-96843 [HIGH] CWE-122 CVE-2026-96843: Heap-based buffer overflow in WebDAV allows an authorized attacker to elevate privileges locally. Heap-based buffer overflow in WebDAV allows an authorized attacker to elevate privileges locally.

CVE-2026-69963 [HIGH] CWE-122 CVE-2026-69963: Heap-based buffer overflow in Microsoft Streaming Service allows an authorized attacker to elevate p Heap-based buffer overflow in Microsoft Streaming Service allows an authorized attacker to elevate privileges locally.

CVE-2026-83847 [HIGH] CWE-122 CVE-2026-83847: Heap-based buffer overflow in Microsoft Account allows an authorized attacker to elevate privileges Heap-based buffer overflow in Microsoft Account allows an authorized attacker to elevate privileges locally.

CVE-2026-69909 [HIGH] CWE-122 CVE-2026-69909: Heap-based buffer overflow in Microsoft COM for Windows allows an authorized attacker to elevate pri Heap-based buffer overflow in Microsoft COM for Windows allows an authorized attacker to elevate privileges locally.

CVE-2026-72927 [HIGH] CWE-122 CVE-2026-72927: Heap-based buffer overflow in Winsock allows an authorized attacker to elevate privileges locally. Heap-based buffer overflow in Winsock allows an authorized attacker to elevate privileges locally.

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-2026-83920 [HIGH] CWE-122 CVE-2026-83920: Heap-based buffer overflow in Microsoft Windows Search Component allows an authorized attacker to el Heap-based buffer overflow in Microsoft Windows Search Component allows an authorized attacker to elevate privileges 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.