Detections
Analytics

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

critical Nessus Plugin ID 314340

Synopsis

The remote Windows host is affected by multiple vulnerabilities.

Description

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 allows an authorized attacker to execute code locally.
 (CVE-2026-40403)

 - Heap-based buffer overflow in Windows Message Queuing allows an unauthorized attacker to execute code over an adjacent network. (CVE-2026-34329)

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 5087471

See Also

https://support.microsoft.com/help/5087471

Plugin Details

Severity: Critical

ID: 314340

File Name: smb_nt_ms26_may_5087471.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_2012:r2

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-2026-21530, CVE-2026-32161, CVE-2026-32170, CVE-2026-32209, CVE-2026-33834, CVE-2026-33837, CVE-2026-33838, CVE-2026-34329, CVE-2026-34330, CVE-2026-34331, CVE-2026-34333, CVE-2026-34334, CVE-2026-34338, CVE-2026-34341, CVE-2026-34342, CVE-2026-34343, CVE-2026-34344, CVE-2026-34347, CVE-2026-34351, CVE-2026-35415, CVE-2026-35416, 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-2026-40401, CVE-2026-40403, CVE-2026-40406, CVE-2026-40407, CVE-2026-40408, CVE-2026-40410, CVE-2026-40413, CVE-2026-40414, CVE-2026-41089, CVE-2026-41095, CVE-2026-42825

MSFT: MS26-5087471

MSKB: 5087471