Security Updates for Microsoft Visual Studio Products (September 2021)

high Nessus Plugin ID 153428
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 Visual Studio Products are missing a security update.


The Microsoft Visual Studio Products are missing a security update. They are, therefore, affected by multiple vulnerabilities:

- A permission assignment vulnerability exists in Visual Studio after installing the Game development with C++ and selecting the Unreal Engine Installer workload. The system is vulnerable to LPE during the installation it creates a directory with write access to all users. (CVE-2021-26434)

- A code execution vulnerability exists in Visual Studio due to incorrect memory handling. An unauthenticated, local attacker can exploit this to bypass authentication and execute arbitrary commands. (CVE-2021-36952)

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


Microsoft has released the following security updates to address this issue:
- Update 15.9.39 for Visual Studio 2017
- Update 16.4.26 for Visual Studio 2019
- Update 16.7.19 for Visual Studio 2019
- Update 16.9.11 for Visual Studio 2019
- Update 16.11.3 for Visual Studio 2019

See Also

Plugin Details

Severity: High

ID: 153428

File Name: smb_nt_ms21_sep_visual_studio.nasl

Version: 1.5

Type: local

Agent: windows

Published: 9/16/2021

Updated: 10/15/2021

Dependencies: microsoft_visual_studio_installed.nbin

Risk Information

CVSS Score Source: CVE-2021-26434


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

Temporal Vector: CVSS2#E:U/RL:OF/RC:C


Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

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:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:2.3:a:microsoft:visual_studio:*:*:*:*:*:*:*:*

Required KB Items: SMB/Registry/Enumerated, installed_sw/Microsoft Visual Studio

Exploit Ease: No known exploits are available

Patch Publication Date: 9/14/2021

Vulnerability Publication Date: 9/14/2021

Reference Information

CVE: CVE-2021-36952, CVE-2021-26434

IAVA: 2021-A-0430-S