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Known vulnerabilities in Microsoft Windows Server 2019 (Server Core installation)

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CVE Summary Score Published
CVE-2026-35424 Missing release of memory after effective lifetime in Windows Internet Key Exchange (IKE) Protocol allows an… 7.5 High May 12, 2026
CVE-2026-35421 Heap-based buffer overflow in Windows GDI allows an unauthorized attacker to execute code locally 7.8 High May 12, 2026
CVE-2026-35422 Authentication bypass using an alternate path or channel in Windows TCP/IP allows an authorized attacker to bypass a… 6.5 Medium May 12, 2026
CVE-2026-35420 Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally 7.8 High May 12, 2026
CVE-2026-35418 Use after free in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally 7.8 High May 12, 2026
CVE-2026-35417 Use after free in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally 7.8 High May 12, 2026
CVE-2026-35415 Integer overflow or wraparound in Windows Storage Spaces Controller allows an authorized attacker to elevate… 7.8 High May 12, 2026
CVE-2026-35416 Access of resource using incompatible type ('type confusion') in Windows Ancillary Function Driver for WinSock allows an… 7.0 High May 12, 2026
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-2026-34345 Access of resource using incompatible type ('type confusion') in Windows Ancillary Function Driver for WinSock allows an… 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-2026-33839 Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Win32K - GRFX… 7.0 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-2026-33824 Exploited Microsoft Internet Key Exchange (IKE) Service Extensions Double Free Vulnerability 9.8 Critical 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

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