CVE-2021-26434
Visual Studio Elevation of Privilege Vulnerability
Visual Studio Elevation of Privilege Vulnerability
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Visual Studio Elevation of Privilege Vulnerability
Visual Studio Elevation of Privilege Vulnerability
- Record
CVE-2021-26434- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Updated
- 2026-11-02
EUVDEUVD-2021-13239
Visual Studio Elevation of Privilege Vulnerability
- Record
EUVD-2021-13239- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-8qhp-jq8m-c4m4
Visual Studio Elevation of Privilege Vulnerability
Visual Studio Elevation of Privilege Vulnerability
- Record
GHSA-8qhp-jq8m-c4m4- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-269, CWE-732
- Updated
- 2026-11-02
NVD
Visual Studio Elevation of Privilege Vulnerability
- Record
CVE-2021-26434- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.2 High
AV:L/AC:L/Au:N/C:C/I:C/A:C - Weakness
- CWE-732
- Updated
- 2026-11-02
Affected products
- microsoft visual studio 2017 version 15.9 (includes 15.0 - 15.8)
- microsoft visual studio 2019 version 16.11 (includes 16.0 - 16.10)
- microsoft visual studio 2019 version 16.4 (includes 16.0 - 16.3)
- microsoft visual studio 2019 version 16.7 (includes 16.0 – 16.6)
- microsoft visual studio 2019 version 16.9 (includes 16.0 - 16.8)
- microsoft visual studio 2017
- microsoft visual studio 2019
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-26434 is a high vulnerability (CVSS 7.8) in Microsoft Visual Studio 2017 Version 15.9 (includes 15.0 - 15.8), published September 15, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.89%, the 59th percentile. No source names a fixed version.