Detections
Analytics

KB5075941: Windows 11 version 23H2 Security Update (February 2026)

high Nessus Plugin ID 298554

Synopsis

The remote Windows host is affected by multiple vulnerabilities.

Description

The remote Windows host is missing security update 5075941. It is, therefore, affected by multiple vulnerabilities

 - Protection mechanism failure in MSHTML Framework allows an unauthorized attacker to bypass a security feature over a network. (CVE-2026-21513)

 - Access of resource using incompatible type ('type confusion') in Desktop Window Manager allows an authorized attacker to elevate privileges locally. (CVE-2026-21519)

 - Heap-based buffer overflow in Windows Hyper-V allows an authorized attacker to execute code locally.
 (CVE-2026-21244, CVE-2026-21248)

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 5075941

See Also

https://support.microsoft.com/help/5075941

Plugin Details

Severity: High

ID: 298554

File Name: smb_nt_ms26_feb_5075941.nasl

Version: 1.2

Type: local

Agent: windows

Published: 2/10/2026

Updated: 2/11/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: High

Score: 8.4

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 8.3

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

CVSS Score Source: CVE-2026-21513

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 8.2

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

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

Vulnerability Information

CPE: cpe:/o:microsoft:windows_11_23h2

Required KB Items: SMB/MS_Bulletin_Checks/Possible

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2/10/2026

Vulnerability Publication Date: 2/10/2026

Reference Information

CVE: CVE-2026-20846, CVE-2026-21222, CVE-2026-21231, CVE-2026-21232, CVE-2026-21234, CVE-2026-21235, CVE-2026-21236, CVE-2026-21237, CVE-2026-21238, CVE-2026-21239, CVE-2026-21240, CVE-2026-21241, CVE-2026-21242, CVE-2026-21244, CVE-2026-21246, CVE-2026-21247, CVE-2026-21248, CVE-2026-21249, CVE-2026-21253, CVE-2026-21255, CVE-2026-21508, CVE-2026-21510, CVE-2026-21513, CVE-2026-21519, CVE-2026-21525, CVE-2026-21533

MSFT: MS26-5075941

MSKB: 5075941