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Known vulnerabilities in Microsoft Windows Server 2012 R2 (Server Core installation)

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CVE Summary Score Published
CVE-2026-34351 Concurrent execution using shared resource with improper synchronization ('race condition') in Windows TCP/IP allows… 7.8 High May 12, 2026
CVE-2026-34347 Use after free in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally 7.0 High May 12, 2026
CVE-2026-34344 Access of resource using incompatible type ('type confusion') in Windows Ancillary Function Driver for WinSock allows an… 7.8 High May 12, 2026
CVE-2026-34342 Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Print Spooler… 7.0 High May 12, 2026
CVE-2026-34343 Heap-based buffer overflow in Windows Application Identity (AppID) Subsystem allows an authorized attacker to elevate… 7.8 High May 12, 2026
CVE-2026-34333 Use after free in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally 7.8 High May 12, 2026
CVE-2026-34330 Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Win32K - GRFX… 7.8 High May 12, 2026
CVE-2026-34331 Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Win32K - GRFX… 7.0 High May 12, 2026
CVE-2026-34329 Heap-based buffer overflow in Windows Message Queuing allows an unauthorized attacker to execute code over an adjacent… 8.8 High May 12, 2026
CVE-2026-33834 Improper access control in Windows Event Logging Service allows an authorized attacker to elevate privileges locally 7.8 High May 12, 2026
CVE-2026-21530 Double free in Windows Rich Text Edit allows an authorized attacker to elevate privileges locally 6.7 Medium May 12, 2026
CVE-2026-32214 Improper access control in Universal Plug and Play (upnp.dll) allows an authorized attacker to disclose information… 5.5 Medium Apr 14, 2026
CVE-2026-33829 Exposure of sensitive information to an unauthorized actor in Windows Snipping Tool allows an unauthorized attacker to… 4.3 Medium Apr 14, 2026
CVE-2026-33827 Concurrent execution using shared resource with improper synchronization ('race condition') in Windows TCP/IP allows… 8.1 High Apr 14, 2026
CVE-2026-33104 Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Win32K - GRFX… 7.0 High Apr 14, 2026
CVE-2026-33100 Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges… 7.0 High Apr 14, 2026
CVE-2026-33099 Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges… 7.0 High Apr 14, 2026
CVE-2026-32225 Improper neutralization of special elements used in a command ('command injection') in Windows Shell allows an… 8.8 High Apr 14, 2026
CVE-2026-32150 Concurrent execution using shared resource with improper synchronization ('race condition') in Function Discovery… 7.0 High Apr 14, 2026
CVE-2026-32151 Exposure of sensitive information to an unauthorized actor in Windows Shell allows an authorized attacker to disclose… 6.5 Medium Apr 14, 2026
CVE-2026-32086 Concurrent execution using shared resource with improper synchronization ('race condition') in Function Discovery… 7.0 High Apr 14, 2026
CVE-2026-32084 Exposure of sensitive information to an unauthorized actor in Windows File Explorer allows an authorized attacker to… 5.5 Medium Apr 14, 2026
CVE-2026-32077 Untrusted pointer dereference in Windows Universal Plug and Play (UPnP) Device Host allows an authorized attacker to… 7.8 High Apr 14, 2026
CVE-2026-32070 Use after free in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally 7.0 High Apr 14, 2026
CVE-2026-32068 Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SSDP Service… 7.0 High Apr 14, 2026

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