Microsoft Windows 11 Version 26H1 vulnerabilities

CVE-2026-100203 [HIGH] CWE-122 CVE-2026-100203: Heap-based buffer overflow in Windows Update Service allows an authorized attacker to elevate privil Heap-based buffer overflow in Windows Update Service allows an authorized attacker to elevate privileges locally.

CVE-2026-83724 [HIGH] CWE-122 CVE-2026-83724: 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-2026-85791 [HIGH] CWE-122 CVE-2026-85791: Heap-based buffer overflow in Windows Encrypting File System (EFS) allows an authorized attacker to Heap-based buffer overflow in Windows Encrypting File System (EFS) allows an authorized attacker to elevate privileges locally.

CVE-2026-83921 [HIGH] CWE-122 CVE-2026-83921: 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-2026-41108 [HIGH] CWE-122 CVE-2026-41108: Heap-based buffer overflow in Microsoft Windows DNS allows an authorized attacker to elevate privile Heap-based buffer overflow in Microsoft Windows DNS allows an authorized attacker to elevate privileges locally.

CVE-2026-69970 [HIGH] CWE-122 CVE-2026-69970: 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-2026-68884 [HIGH] CWE-122 CVE-2026-68884: 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-2026-68897 [HIGH] CWE-122 CVE-2026-68897: Heap-based buffer overflow in Microsoft Standard XPS allows an authorized attacker to elevate privil Heap-based buffer overflow in Microsoft Standard XPS allows an authorized attacker to elevate privileges locally.

CVE-2026-70568 [HIGH] CWE-122 CVE-2026-70568: Heap-based buffer overflow in Windows Defender Firewall Service allows an authorized attacker to ele Heap-based buffer overflow in Windows Defender Firewall Service allows an authorized attacker to elevate privileges locally.

CVE-2026-69621 [HIGH] CWE-122 CVE-2026-69621: 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-2026-69394 [HIGH] CWE-122 CVE-2026-69394: 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.

CVE-2026-62753 [HIGH] CWE-122 CVE-2026-62753: Heap-based buffer overflow in Windows HTTP.sys allows an authorized attacker to elevate privileges l Heap-based buffer overflow in Windows HTTP.sys allows an authorized attacker to elevate privileges locally.

CVE-2026-85828 [HIGH] CWE-122 CVE-2026-85828: 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-2026-45653 [HIGH] CWE-122 CVE-2026-45653: 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-2026-32195 [HIGH] CWE-121 CVE-2026-32195: Stack-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges lo Stack-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.

CVE-2026-83871 [HIGH] CWE-122 CVE-2026-83871: Heap-based buffer overflow in OpenSSH for Windows allows an authorized attacker to elevate privilege Heap-based buffer overflow in OpenSSH for Windows allows an authorized attacker to elevate privileges locally.

CVE-2026-84014 [HIGH] CWE-122 CVE-2026-84014: 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-2026-85827 [HIGH] CWE-122 CVE-2026-85827: 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-2026-83683 [MEDIUM] CWE-36 CVE-2026-83683: Absolute path traversal in Windows Encrypting File System (EFS) allows an authorized attacker to dis Absolute path traversal in Windows Encrypting File System (EFS) allows an authorized attacker to disclose information over a network.

CVE-2026-85840 [MEDIUM] CWE-552 CVE-2026-85840: Files or directories accessible to external parties in Windows Event Viewer allows an authorized att Files or directories accessible to external parties in Windows Event Viewer allows an authorized attacker to disclose information over a network.