Security Updates for Microsoft Visual Studio Products (August 2021)

medium Nessus Plugin ID 152423
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 denial of service (DoS) vulnerability. An attacker can exploit this issue to cause the affected component to deny system or application services. (CVE-2021-26423)

- An information disclosure vulnerability. An attacker can exploit this to disclose potentially sensitive information. (CVE-2021-34485, CVE-2021-34532)

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 15.9.38 for Visual Studio 2017
- Update 16.4.25 for Visual Studio 2019
- Update 16.7.18 for Visual Studio 2019
- Update 16.9.10 for Visual Studio 2019
- Update 16.11.0 for Visual Studio 2019

See Also

Plugin Details

Severity: Medium

ID: 152423

File Name: smb_nt_ms21_aug_visual_studio.nasl

Version: 1.6

Type: local

Agent: windows

Published: 8/10/2021

Updated: 9/16/2021

Dependencies: microsoft_visual_studio_installed.nbin

Risk Information

CVSS Score Source: CVE-2021-34532


Risk Factor: Low

Score: 3.6


Risk Factor: Low

Base Score: 2.1

Temporal Score: 1.6

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

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


Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.8

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

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

Vulnerability Information

CPE: cpe:/a:microsoft:visual_studio

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

Exploit Ease: No known exploits are available

Patch Publication Date: 8/10/2021

Vulnerability Publication Date: 8/10/2021

Reference Information

CVE: CVE-2021-26423, CVE-2021-34485, CVE-2021-34532

IAVA: 2021-A-0380-S