Use after free in Windows Hyper-V allows an unauthorized attacker to elevate privileges locally.

The remote Windows host is missing security update 5087545 or hotpatch 5087424. 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)

  - Use after free in Windows Hyper-V allows an unauthorized attacker to elevate privileges locally.
    (CVE-2026-40402)

  - Heap-based buffer overflow in Windows Win32K - GRFX allows an authorized attacker to execute code locally.
    (CVE-2026-40403)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Windows host is missing security update 5087420. 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)

  - Use after free in Windows Hyper-V allows an unauthorized attacker to elevate privileges locally.
    (CVE-2026-40402)

  - Heap-based buffer overflow in Windows Win32K - GRFX allows an authorized attacker to execute code locally.
    (CVE-2026-40403)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Type	Severity
314352	KB5087545: Windows Server 2022 / Azure Stack HCI 22H2 Security Update (May 2026)	Nessus	Windows : Microsoft Bulletins	Local	high
314349	KB5087420: Windows 11 version 23H2 Security Update (May 2026)	Nessus	Windows : Microsoft Bulletins	Local	high

Detections

Analytics

CVE-2026-40402

critical

Tenable Plugins

high

high