KB5087545: Windows Server 2022 / Azure Stack HCI 22H2 Security Update (May 2026)

critical Nessus Plugin ID 314352

Synopsis

The remote Windows host is affected by multiple vulnerabilities.

Description

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.

Solution

Apply Security Update 5087545 or hotpatch 5087424

See Also

https://support.microsoft.com/help/5087545

Plugin Details

Severity: Critical

ID: 314352

File Name: smb_nt_ms26_may_5087545.nasl

Version: 1.1

Type: Local

Agent: windows

Published: 5/12/2026

Updated: 5/12/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2026-41089

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:microsoft:windows_server_2022, cpe:/o:microsoft:azure_stack_hci:22h2

Required KB Items: SMB/MS_Bulletin_Checks/Possible

Exploit Ease: No known exploits are available

Patch Publication Date: 5/12/2026

Vulnerability Publication Date: 5/12/2026

Reference Information

CVE: CVE-2025-54518, CVE-2026-21530, CVE-2026-32161, CVE-2026-32170, CVE-2026-32209, CVE-2026-33834, CVE-2026-33835, CVE-2026-33837, CVE-2026-33838, CVE-2026-33839, CVE-2026-33841, CVE-2026-34329, CVE-2026-34330, CVE-2026-34331, CVE-2026-34333, CVE-2026-34334, CVE-2026-34336, CVE-2026-34337, CVE-2026-34338, CVE-2026-34339, CVE-2026-34340, CVE-2026-34341, CVE-2026-34342, CVE-2026-34343, CVE-2026-34344, CVE-2026-34345, CVE-2026-34347, CVE-2026-34351, CVE-2026-35415, CVE-2026-35416, CVE-2026-35417, CVE-2026-35418, CVE-2026-35420, CVE-2026-35421, CVE-2026-35422, CVE-2026-35423, CVE-2026-35424, CVE-2026-40377, CVE-2026-40380, CVE-2026-40382, CVE-2026-40397, CVE-2026-40398, CVE-2026-40399, CVE-2026-40401, CVE-2026-40402, CVE-2026-40403, CVE-2026-40406, CVE-2026-40407, CVE-2026-40408, CVE-2026-40410, CVE-2026-40413, CVE-2026-40414, CVE-2026-40415, CVE-2026-41088, CVE-2026-41089, CVE-2026-41095, CVE-2026-41097, CVE-2026-42825

MSFT: MS26-5087424, MS26-5087545

MSKB: 5087424, 5087545