Detections
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KB5073723: Windows 10 version 1809 / Windows Server 2019 Security Update (January 2026)

high Nessus Plugin ID 283470

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Synopsis

The remote Windows host is affected by multiple vulnerabilities.

Description

The remote Windows host is missing security update 5073723. It is, therefore, affected by multiple vulnerabilities

 - Untrusted pointer dereference in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally. (CVE-2026-20857)

 - An issue was discovered in Broadcom) LSI PCI-SV92EX Soft Modem Kernel Driver through 2.2.100.1 (aka AGRSM64.sys). There is Local Privilege Escalation to SYSTEM via a Stack Overflow in RTLCopyMemory (IOCTL 0x1b2150). An attacker can exploit this to elevate privileges from a medium-integrity process to SYSTEM.
 This can also be used to bypass kernel-level protections such as AV or PPL, because exploit code runs with high-integrity privileges and can be used in coordinated BYOVD (bring your own vulnerable driver) ransomware campaigns. (CVE-2023-31096)

 - Windows Remote Procedure Call Interface Definition Language (IDL) Elevation of Privilege Vulnerability (CVE-2026-20832)

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 5073723

See Also

https://support.microsoft.com/help/5073723

Plugin Details

Severity: High

ID: 283470

File Name: smb_nt_ms26_jan_5073723.nasl

Version: 1.2

Type: local

Agent: windows

Published: 1/13/2026

Updated: 1/13/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Critical

Score: 9.2

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-2026-20868

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7.2

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

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

CVSS Score Source: CVE-2023-31096

Vulnerability Information

CPE: cpe:/o:microsoft:windows_server_2019, cpe:/o:microsoft:windows_10_1809

Required KB Items: SMB/MS_Bulletin_Checks/Possible

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 1/13/2026

Vulnerability Publication Date: 10/10/2023

CISA Known Exploited Vulnerability Due Dates: 2/3/2026

Reference Information

CVE: CVE-2023-31096, CVE-2024-55414, CVE-2026-0386, CVE-2026-20804, CVE-2026-20805, CVE-2026-20809, CVE-2026-20810, CVE-2026-20812, CVE-2026-20814, CVE-2026-20816, CVE-2026-20818, CVE-2026-20820, CVE-2026-20821, CVE-2026-20822, CVE-2026-20823, CVE-2026-20824, CVE-2026-20825, CVE-2026-20826, CVE-2026-20827, CVE-2026-20828, CVE-2026-20829, CVE-2026-20831, CVE-2026-20832, CVE-2026-20833, CVE-2026-20834, CVE-2026-20836, CVE-2026-20837, CVE-2026-20839, CVE-2026-20840, CVE-2026-20843, CVE-2026-20844, CVE-2026-20847, CVE-2026-20848, CVE-2026-20849, CVE-2026-20852, CVE-2026-20853, CVE-2026-20856, CVE-2026-20857, CVE-2026-20858, CVE-2026-20860, CVE-2026-20861, CVE-2026-20862, CVE-2026-20864, CVE-2026-20865, CVE-2026-20866, CVE-2026-20867, CVE-2026-20868, CVE-2026-20869, CVE-2026-20872, CVE-2026-20873, CVE-2026-20874, CVE-2026-20875, CVE-2026-20877, CVE-2026-20918, CVE-2026-20919, CVE-2026-20921, CVE-2026-20922, CVE-2026-20923, CVE-2026-20924, CVE-2026-20925, CVE-2026-20926, CVE-2026-20927, CVE-2026-20929, CVE-2026-20931, CVE-2026-20932, CVE-2026-20934, CVE-2026-20936, CVE-2026-20937, CVE-2026-20939, CVE-2026-20940, CVE-2026-20962, CVE-2026-21265

MSFT: MS26-5073723

MSKB: 5073723