Microsoft Windows 11 Version 26H1 vulnerabilities

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-2026-32225 [HIGH] CWE-693 CVE-2026-32225: Improper neutralization of special elements used in a command ('command injection') in Windows Shell Improper neutralization of special elements used in a command ('command injection') in Windows Shell allows an unauthorized attacker to bypass a security feature over a network.

CVE-2026-70068 [HIGH] CWE-122 CVE-2026-70068: Heap-based buffer overflow in Windows Client-Side Caching (CSC) Service allows an unauthorized attac Heap-based buffer overflow in Windows Client-Side Caching (CSC) Service allows an unauthorized attacker to elevate privileges over a network.

CVE-2026-70262 [HIGH] CWE-122 CVE-2026-70262: Heap-based buffer overflow in WebDAV allows an unauthorized attacker to elevate privileges over a ne Heap-based buffer overflow in WebDAV allows an unauthorized attacker to elevate privileges over a network.

CVE-2026-83789 [HIGH] CWE-122 CVE-2026-83789: Heap-based buffer overflow in Windows SMB Client allows an unauthorized attacker to elevate privileg Heap-based buffer overflow in Windows SMB Client allows an unauthorized attacker to elevate privileges over a network.

CVE-2026-69461 [HIGH] CWE-121 CVE-2026-69461: Stack-based buffer overflow in Windows NTFS allows an unauthorized attacker to execute code over a n Stack-based buffer overflow in Windows NTFS 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-2026-83777 [HIGH] CWE-122 CVE-2026-83777: Heap-based buffer overflow in Windows Bluetooth Service allows an unauthorized attacker to elevate p Heap-based buffer overflow in Windows Bluetooth Service allows an unauthorized attacker to elevate privileges over an adjacent network.

CVE-2026-83928 [HIGH] CWE-306 CVE-2026-83928: Out-of-bounds write in Windows Local Security Authority Subsystem Service (LSASS) allows an unauthor Out-of-bounds write in Windows Local Security Authority Subsystem Service (LSASS) allows an unauthorized attacker to execute code over a network.

CVE-2026-105010 [CRITICAL] CWE-416 CVE-2026-105010: Use after free in Microsoft Windows Search Component allows an unauthorized attacker to elevate priv Use after free in Microsoft Windows Search Component allows an unauthorized attacker to elevate privileges over a network.

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-2026-83784 [HIGH] CWE-36 CVE-2026-83784: Absolute path traversal in Windows Encrypting File System (EFS) allows an authorized attacker to ele Absolute path traversal in Windows Encrypting File System (EFS) allows an authorized attacker to elevate privileges over a network.

CVE-2026-70089 [HIGH] CWE-122 CVE-2026-70089: Heap-based buffer overflow in Windows GDI allows an unauthorized attacker to execute code over a net Heap-based buffer overflow in Windows GDI allows an unauthorized attacker to execute code over a network.

CVE-2026-77496 [HIGH] CWE-122 CVE-2026-77496: Heap-based buffer overflow in Windows Imaging Component allows an unauthorized attacker to execute c Heap-based buffer overflow in Windows Imaging Component allows an unauthorized attacker to execute code over a network.

CVE-2026-83523 [HIGH] CWE-122 CVE-2026-83523: Heap-based buffer overflow in Windows Image Acquisition allows an unauthorized attacker to execute c Heap-based buffer overflow in Windows Image Acquisition allows an unauthorized attacker to execute code over a network.

CVE-2026-70258 [HIGH] CWE-122 CVE-2026-70258: 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.