Security Updates for Microsoft Dynamics 365 (on-premises) (August 2021)

high Nessus Plugin ID 152525
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.


The Microsoft Dynamics 365 (on-premises) is affected by an cross-site scripting vulnerability.


The Microsoft Dynamics 365 (on-premises) installation on the remote host is missing security updates. It is, therefore, affected by multiple vulnerabilities:

- Remote Code Execution Vulnerability (CVE-2021-34524)

- Cross-site Scripting Vulnerabilities (CVE-2021-36946, CVE-2021-36950)

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:

See Also

Plugin Details

Severity: High

ID: 152525

File Name: smb_nt_ms21_aug_microsoft_dynamics.nasl

Version: 1.5

Type: local

Agent: windows

Published: 8/12/2021

Updated: 8/19/2021

Dependencies: microsoft_dynamics_365_detect.nbin

Risk Information

CVSS Score Source: CVE-2021-34524


Risk Factor: Medium

Score: 6.7


Risk Factor: Medium

Base Score: 6.5

Temporal Score: 4.8

Vector: AV:N/AC:L/Au:S/C:P/I:P/A:P

Temporal Vector: E:U/RL:OF/RC:C


Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

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

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:microsoft:dynamics_365

Required KB Items: installed_sw/Microsoft Dynamics 365 Server

Exploit Ease: No known exploits are available

Patch Publication Date: 8/10/2021

Vulnerability Publication Date: 8/10/2021

Reference Information

CVE: CVE-2021-34524, CVE-2021-36946, CVE-2021-36950

MSKB: 4618809, 4618795, 5005239

MSFT: MS21-4618809, MS21-4618795, MS21-5005239

IAVA: 2021-A-0375