Microsoft Windows Server 2012 R2 vulnerabilities

CVE-2026-40401 High · 7.1 CWE-476 May 12, 2026

Windows TCP/IP Denial of Service Vulnerability

CVE-2026-40398 High · 7.8 CWE-122 May 12, 2026

Windows Remote Desktop Services Elevation of Privilege Vulnerability

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

CVE-2026-40397 High · 7.8 CWE-191 May 12, 2026

Windows Common Log File System Driver Elevation of Privilege Vulnerability

Heap-based buffer overflow in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.

CVE-2026-40382 High · 7.8 CWE-416 May 12, 2026

Windows Telephony Service Elevation of Privilege Vulnerability

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

CVE-2026-40380 Medium · 6.2 CWE-122 May 12, 2026

Windows Volume Manager Extension Driver Remote Code Execution Vulnerability

Heap-based buffer overflow in Volume Manager Extension Driver allows an authorized attacker to execute code with a physical attack.

CVE-2026-40377 High · 7.8 CWE-122 May 12, 2026

Microsoft Cryptographic Services Elevation of Privilege Vulnerability

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

CVE-2026-35424 High · 7.5 CWE-401 May 12, 2026

Internet Key Exchange (IKE) Protocol Denial of Service Vulnerability

Missing release of memory after effective lifetime in Windows Internet Key Exchange (IKE) Protocol allows an unauthorized attacker to deny service over a network.

CVE-2026-35423 Medium · 5.4 CWE-125 May 12, 2026

Windows 11 Telnet Client Information Disclosure Vulnerability

Out-of-bounds read in Telnet Client allows an unauthorized attacker to disclose information over a network.

CVE-2026-35422 Medium · 6.5 CWE-288 May 12, 2026

Windows TCP/IP Driver Security Feature Bypass Vulnerability

Authentication bypass using an alternate path or channel in Windows TCP/IP allows an authorized attacker to bypass a security feature over a network.

CVE-2026-35421 High · 7.8 CWE-122 May 12, 2026

Windows GDI Remote Code Execution Vulnerability

Heap-based buffer overflow in Windows GDI allows an unauthorized attacker to execute code locally.

CVE-2026-35420 High · 7.8 CWE-122 May 12, 2026

Windows Kernel Elevation of Privilege Vulnerability

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

CVE-2026-35416 High · 7.0 CWE-416 May 12, 2026

Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability

Access of resource using incompatible type ('type confusion') in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

CVE-2026-35415 High · 7.8 CWE-190 May 12, 2026

Windows Storage Spaces Controller Elevation of Privilege Vulnerability

Integer overflow or wraparound in Windows Storage Spaces Controller allows an authorized attacker to elevate privileges locally.

CVE-2026-34351 High · 7.0 CWE-362 May 12, 2026

Windows TCP/IP Elevation of Privilege Vulnerability

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

CVE-2026-34347 High · 7.0 CWE-416 May 12, 2026

Windows Win32k Elevation of Privilege Vulnerability

Use after free in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally.

CVE-2026-34344 High · 7.8 CWE-843 May 12, 2026

Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability

Access of resource using incompatible type ('type confusion') in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

CVE-2026-34343 High · 7.8 CWE-122 May 12, 2026

Windows Application Identity (AppID) Subsystem Elevation of Privilege Vulnerability

Heap-based buffer overflow in Windows Application Identity (AppID) Subsystem allows an authorized attacker to elevate privileges locally.

CVE-2026-34342 High · 7.0 CWE-362 May 12, 2026

Windows Print Spooler Elevation of Privilege Vulnerability

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

CVE-2026-34341 High · 7.0 CWE-415 May 12, 2026

Windows Link-Layer Discovery Protocol (LLDP) Elevation of Privilege Vulnerability

Double free in Windows Link-Layer Discovery Protocol (LLDP) allows an authorized attacker to elevate privileges locally.

CVE-2026-34338 High · 7.8 CWE-416 May 12, 2026

Windows Telephony Service Elevation of Privilege Vulnerability

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

CVE-2026-34334 High · 7.0 CWE-362 May 12, 2026

Windows TCP/IP Elevation of Privilege Vulnerability

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

CVE-2026-34333 High · 7.8 CWE-190 May 12, 2026

Windows Win32k Elevation of Privilege Vulnerability

Use after free in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally.

CVE-2026-34331 High · 7.0 CWE-362 May 12, 2026

Win32k Elevation of Privilege Vulnerability

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally.

CVE-2026-34330 High · 7.8 CWE-190 May 12, 2026

Win32k Elevation of Privilege Vulnerability

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally.

CVE-2026-34329 High · 8.8 CWE-122 May 12, 2026

Microsoft Message Queuing (MSMQ) Remote Code Execution Vulnerability

Heap-based buffer overflow in Windows Message Queuing allows an unauthorized attacker to execute code over an adjacent network.