Microsoft Windows 11 26h1 vulnerabilities

CVE-2026-50647 High · 7.5 CWE-835 Jul 14, 2026

Active Directory Federation Server Denial of Service Vulnerability

Loop with unreachable exit condition ('infinite loop') in Active Directory Federation Services (AD FS) allows an unauthorized attacker to deny service over a network.

CVE-2026-50509 High · 7.8 CWE-502 Jul 14, 2026

Wireless Wide Area Network Service (WwanSvc) Elevation of Privilege Vulnerability

Deserialization of untrusted data in Windows Wireless Wide Area Network Service allows an authorized attacker to elevate privileges locally.

CVE-2026-50505 High · 8.8 CWE-416 Jul 14, 2026

Windows Message Queuing Service (MSMQ) Remote Code Execution Vulnerability

Use after free in Windows Message Queuing allows an authorized attacker to execute code over a network.

CVE-2026-50504 High · 7.5 CWE-126 Jul 14, 2026

Windows Remote Desktop Client Information Disclosure Vulnerability

Buffer over-read in Remote Desktop Client allows an unauthorized attacker to disclose information over a network.

CVE-2026-50503 High · 7.0 CWE-362 Jul 14, 2026

Windows Runtime Elevation of Privilege Vulnerability

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Runtime allows an authorized attacker to elevate privileges locally.

CVE-2026-50502 High · 8.8 CWE-1220 Jul 14, 2026

Windows Event Logging Service Remote Code Execution Vulnerability

Insufficient granularity of access control in Windows Event Logging Service allows an authorized attacker to execute code over a network.

CVE-2026-50501 High · 7.8 CWE-121 Jul 14, 2026

Windows Resilient File System (ReFS) Remote Code Execution Vulnerability

Stack-based buffer overflow in Windows Resilient File System (ReFS) allows an unauthorized attacker to execute code locally.

CVE-2026-50500 High · 8.8 CWE-416 Jul 14, 2026

Windows Netlogon Elevation of Privilege Vulnerability

Use after free in Windows Netlogon allows an authorized attacker to elevate privileges over a network.

CVE-2026-50499 High · 7.8 CWE-122 Jul 14, 2026

Windows Print Spooler Elevation of Privilege Vulnerability

Heap-based buffer overflow in Windows Print Spooler Components allows an authorized attacker to elevate privileges locally.

CVE-2026-50498 High · 7.8 CWE-125 Jul 14, 2026

Windows Universal Disk Format File System Driver (UDFS) Elevation of Privilege Vulnerability

CVE-2026-50497 High · 7.5 CWE-193 Jul 14, 2026

Windows Remote Desktop Protocol (RDP) Information Disclosure Vulnerability

Off-by-one error in Windows Remote Desktop Protocol allows an unauthorized attacker to disclose information over a network.

CVE-2026-50496 High · 7.5 CWE-125 Jul 14, 2026

Windows Network Policy Server SNMP Information Disclosure Vulnerability

Out-of-bounds read in Windows Network Policy Server SNMP allows an unauthorized attacker to disclose information over a network.

CVE-2026-50495 Medium · 5.5 CWE-284 Jul 14, 2026

DNS Client Tampering Vulnerability

Improper access control in Microsoft Windows DNS allows an authorized attacker to perform tampering locally.

CVE-2026-50494 High · 7.8 CWE-122 Jul 14, 2026

Windows NTFS Remote Code Execution Vulnerability

Heap-based buffer overflow in Windows NTFS allows an authorized attacker to execute code locally.

CVE-2026-50493 High · 7.8 CWE-416 Jul 14, 2026

DirectX Graphics Kernel Elevation of Privilege Vulnerability

Use after free in Windows Graphics Kernel allows an authorized attacker to elevate privileges locally.

CVE-2026-50492 Medium · 6.8 CWE-122 Jul 14, 2026

Windows Resilient File System (ReFS) Remote Code Execution Vulnerability

Heap-based buffer overflow in Windows Resilient File System (ReFS) allows an unauthorized attacker to execute code with a physical attack.

CVE-2026-50491 High · 7.8 CWE-125 Jul 14, 2026

Code Integrity DLL (ci.dll) Elevation of Privilege Vulnerability

Out-of-bounds read in Code Integrity DLL (ci.dll) allows an authorized attacker to elevate privileges locally.

CVE-2026-50490 High · 7.8 CWE-416 Jul 14, 2026

Windows Installer Elevation of Privilege Vulnerability

Use after free in Windows Installer allows an authorized attacker to elevate privileges locally.

CVE-2026-50489 High · 7.8 CWE-122 Jul 14, 2026

Win32k Elevation of Privilege Vulnerability

Heap-based buffer overflow in Windows Win32K allows an authorized attacker to elevate privileges locally.

CVE-2026-50487 Critical · 9.8 CWE-416 Jul 14, 2026

Windows DNS Client Elevation of Privilege Vulnerability

Use after free in Microsoft Windows DNS allows an unauthorized attacker to elevate privileges over a network.

CVE-2026-50486 High · 7.8 CWE-416 Jul 14, 2026

Windows Runtime Elevation of Privilege Vulnerability

Use after free in Windows Runtime allows an authorized attacker to elevate privileges locally.

CVE-2026-50485 Medium · 5.7 CWE-126 Jul 14, 2026

Windows Hyper-V Denial of Service Vulnerability

Buffer over-read in Windows Hyper-V allows an authorized attacker to deny service over an adjacent network.

CVE-2026-50484 High · 7.8 CWE-122 Jul 14, 2026

Windows Kernel Elevation of Privilege Vulnerability

Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.

CVE-2026-50483 Medium · 5.5 CWE-200 Jul 14, 2026

Windows Graphics Component Information Disclosure Vulnerability

Exposure of sensitive information to an unauthorized actor in Microsoft Graphics Component allows an authorized attacker to disclose information locally.

CVE-2026-50482 High · 7.8 CWE-122 Jul 14, 2026

Windows NTFS Remote Code Execution Vulnerability

Heap-based buffer overflow in Windows NTFS allows an authorized attacker to execute code locally.