Microsoft Windows 11 Version 26H2 vulnerabilities

CVE-2026-83698 [HIGH] CWE-122 CVE-2026-83698: Heap-based buffer overflow in Windows Client-Side Caching (CSC) Service allows an authorized attacke Heap-based buffer overflow in Windows Client-Side Caching (CSC) Service allows an authorized attacker to elevate privileges locally.

CVE-2026-87699 [HIGH] CWE-122 CVE-2026-87699: Heap-based buffer overflow in Winlogon allows an authorized attacker to elevate privileges locally. Heap-based buffer overflow in Winlogon allows an authorized attacker to elevate privileges locally.

CVE-2026-83783 [HIGH] CWE-122 CVE-2026-83783: Heap-based buffer overflow in Windows Management Instrumentation allows an authorized attacker to el Heap-based buffer overflow in Windows Management Instrumentation allows an authorized attacker to elevate privileges locally.

CVE-2026-83640 [HIGH] CWE-122 CVE-2026-83640: 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-2026-83650 [HIGH] CWE-122 CVE-2026-83650: Heap-based buffer overflow in Windows Media allows an authorized attacker to elevate privileges loca Heap-based buffer overflow in Windows Media allows an authorized attacker to elevate privileges locally.

CVE-2026-83829 [HIGH] CWE-122 CVE-2026-83829: 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-2026-83639 [HIGH] CWE-122 CVE-2026-83639: Heap-based buffer overflow in Windows Sensor Data Service allows an authorized attacker to elevate p Heap-based buffer overflow in Windows Sensor Data Service allows an authorized attacker to elevate privileges locally.

CVE-2026-83863 [HIGH] CWE-122 CVE-2026-83863: Heap-based buffer overflow in Servicing Stack Updates allows an authorized attacker to elevate privi Heap-based buffer overflow in Servicing Stack Updates allows an authorized attacker to elevate privileges locally.

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-2026-96916 [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-2026-83920 [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-2026-85358 [HIGH] CWE-122 CVE-2026-85358: Heap-based buffer overflow in Windows Installer allows an authorized attacker to elevate privileges Heap-based buffer overflow in Windows Installer allows an authorized attacker to elevate privileges locally.

CVE-2026-85366 [HIGH] CWE-122 CVE-2026-85366: Heap-based buffer overflow in Windows Installer allows an authorized attacker to elevate privileges Heap-based buffer overflow in Windows Installer allows an authorized attacker to elevate privileges locally.

CVE-2026-85318 [HIGH] CWE-122 CVE-2026-85318: Heap-based buffer overflow in Servicing Stack Updates allows an authorized attacker to elevate privi Heap-based buffer overflow in Servicing Stack Updates allows an authorized attacker to elevate privileges locally.

CVE-2026-85927 [HIGH] CWE-122 CVE-2026-85927: Heap-based buffer overflow in Windows Universal Plug and Play (UPnP) Device Host allows an authorize Heap-based buffer overflow in Windows Universal Plug and Play (UPnP) Device Host allows an authorized attacker to elevate privileges locally.