Security Updates for Microsoft Exchange Server (August 2023)

critical Nessus Plugin ID 179486


The Microsoft Exchange Server installed on the remote host is affected by multiple vulnerabilities.


The Microsoft Exchange Server installed on the remote host is missing a security update. It is, therefore, affected by multiple vulnerabilities as referenced in the Aug, 2023 security bulletin.

- Microsoft Exchange Remote Code Execution Vulnerability (CVE-2023-35368)

- Microsoft Exchange Server Remote Code Execution Vulnerability (CVE-2023-35388, CVE-2023-38182, CVE-2023-38185)

- Microsoft Exchange Server Elevation of Privilege Vulnerability (CVE-2023-21709)

- Microsoft Exchange Server Spoofing Vulnerability (CVE-2023-38181)

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


Microsoft has released the following security updates to address this issue:

Plugin Details

Severity: Critical

ID: 179486

File Name: smb_nt_ms23_aug_exchange.nasl

Version: 1.4

Type: local

Agent: windows

Published: 8/8/2023

Updated: 6/6/2024

Supported Sensors: Frictionless Assessment Agent, Nessus

Risk Information


Risk Factor: High

Score: 7.4


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-2023-21709


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:/a:microsoft:exchange_server:2016, cpe:/a:microsoft:exchange_server:2019

Required KB Items: SMB/MS_Bulletin_Checks/Possible

Exploit Ease: No known exploits are available

Patch Publication Date: 8/8/2023

Vulnerability Publication Date: 8/8/2023

Reference Information

CVE: CVE-2023-21709, CVE-2023-35368, CVE-2023-35388, CVE-2023-38181, CVE-2023-38182, CVE-2023-38185

IAVA: 2023-A-0403-S

MSFT: MS23-5029388

MSKB: 5029388