Security Updates for Windows Defender (September 2023)

high Nessus Plugin ID 181341


An antimalware application installed on the remote host is affected by an attack surface reduction vulnerability.


The Malware Protection Engine version of Microsoft Windows Defender installed on the remote Windows host is prior to 1.1.23080.2005. It is, therefore, affected by an attack surface reduction vulnerability due to security features bypass. A remote attacker can trick a victim to open a specially crafted file and bypass the Windows Defender Attack Surface Reduction blocking feature.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.


Update Microsoft Defender to engine version 1.1.23080.2005 to address this issue.

See Also

Plugin Details

Severity: High

ID: 181341

File Name: smb_nt_ms23_sep_win_defender.nasl

Version: 1.4

Type: local

Agent: windows

Published: 9/13/2023

Updated: 12/1/2023

Risk Information


Risk Factor: Medium

Score: 6.7


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-2023-38163


Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/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, cpe:/a:microsoft:windows_defender

Required KB Items: installed_sw/Windows Defender

Exploit Ease: No known exploits are available

Patch Publication Date: 8/30/2023

Vulnerability Publication Date: 9/12/2023

Reference Information

CVE: CVE-2023-38163

IAVA: 2023-A-0488-S