CVE-2026-40403

CVE-2026-40403 describes a heap-based buffer overflow in Windows Win32K GRFX that could allow a locally authenticated attacker to execute code. Affected component is Windows graphics subsystem (Win32K GRFX); cause is a heap-based overflow. Impact per available data is local code execution with hi...

CVE-2026-40403

Heap-based buffer overflow in Windows Win32K - GRFX allows an authorized attacker to execute code locally...

KB5089548: Windows 11 Version 26H1 Security Update (May 2026)

The remote Windows host is missing security update 5089548. It is, therefore, affected by multiple vulnerabilities - Heap-based buffer overflow in Microsoft Windows DNS allows an unauthorized attacker to execute code over a network. CVE-2026-41096 - Heap-based buffer overflow in Windows Win32K -...

KB5087471: Windows Server 2012 R2 Security Update (May 2026)

The remote Windows host is missing security update 5087471. It is, therefore, affected by multiple vulnerabilities - Stack-based buffer overflow in Windows Netlogon allows an unauthorized attacker to execute code over a network. CVE-2026-41089 - Heap-based buffer overflow in Windows Win32K - GRFX...