Detections
Analytics

KB5099414: Windows 11 version 23H2 Security Update (July 2026)

critical Nessus Plugin ID 326855

Synopsis

The remote Windows host is affected by multiple vulnerabilities.

Description

The remote Windows host is missing security update 5099414. It is, therefore, affected by multiple vulnerabilities

 - Heap-based buffer overflow in Windows NTFS allows an unauthorized attacker to execute code locally.
 (CVE-2026-50471)

 - Heap-based buffer overflow in Windows FTP Service allows an unauthorized attacker to execute code over a network. (CVE-2026-49172)

 - Improper validation of consistency within input in Windows Secure Kernel Mode allows an authorized attacker to elevate privileges locally. (CVE-2026-42982)

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 5099414

See Also

https://support.microsoft.com/help/5099414

Plugin Details

Severity: Critical

ID: 326855

File Name: smb_nt_ms26_jul_5099414.nasl

Version: 1.1

Type: Local

Agent: windows

Published: 7/14/2026

Updated: 7/14/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.9

Percentile: 96.93

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

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

CVSS Score Source: CVE-2026-50471

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

CVSS Score Source: CVE-2026-49172

Vulnerability Information

CPE: cpe:/o:microsoft:windows_11_23h2

Required KB Items: SMB/MS_Bulletin_Checks/Possible

Exploit Ease: No known exploits are available

Patch Publication Date: 7/14/2026

Vulnerability Publication Date: 7/14/2026

Reference Information

CVE: CVE-2026-33842, CVE-2026-34328, CVE-2026-34346, CVE-2026-34348, CVE-2026-40378, CVE-2026-42982, CVE-2026-42990, CVE-2026-44800, CVE-2026-48571, CVE-2026-48572, CVE-2026-49172, CVE-2026-50471, CVE-2026-56173, CVE-2026-58601, CVE-2026-58629, CVE-2026-58640

MSFT: MS26-5099414

MSKB: 5099414