CVE-2021-31204

.NET and Visual Studio Elevation of Privilege Vulnerability

7.3 HighFix available

.NET and Visual Studio Elevation of Privilege Vulnerability

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: Low
User interaction: Required

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

1.19%Up 0.8 points since May 12, 2021

What each source reports

CVE List Score used 7.3

.NET and Visual Studio Elevation of Privilege Vulnerability

.NET and Visual Studio Elevation of Privilege Vulnerability

Record: CVE-2021-31204
CVSS 3.1: 7.3 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Weakness: CWE-269
Updated: 2026-11-02

EUVDEUVD-2021-18117 7.3

.NET and Visual Studio Elevation of Privilege Vulnerability

Record: EUVD-2021-18117
CVSS 3.1: 7.3 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Updated: 2026-11-02

NVD 7.3

.NET and Visual Studio Elevation of Privilege Vulnerability

Record: CVE-2021-31204
CVSS 3.1: 7.3 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 4.6 MediumAV:L/AC:L/Au:N/C:P/I:P/A:P
Weakness: CWE-269
Updated: 2026-11-02

OSV 7.3

.NET and Visual Studio Elevation of Privilege Vulnerability

Record: CVE-2021-31204
CVSS 3.1: 7.3 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVRHSA-2021:1546 7.3

Red Hat Security Advisory: .NET 5.0 on Red Hat Enterprise Linux security and bugfix update

Record: RHSA-2021:1546
CVSS 3.1: 7.3 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVRHSA-2021:1547 7.3

Red Hat Security Advisory: .NET Core 3.1 on Red Hat Enterprise Linux security and bugfix update

Record: RHSA-2021:1547
CVSS 3.1: 7.3 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Updated: 2026-11-02

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OSVRHSA-2021:2036 7.3

Red Hat Security Advisory: dotnet5.0 security and bugfix update

Record: RHSA-2021:2036
CVSS 3.1: 7.3 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVRHSA-2021:2037 7.3

Red Hat Security Advisory: dotnet3.1 security and bugfix update

Record: RHSA-2021:2037
CVSS 3.1: 7.3 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVBIT-dotnet-2021-31204 No score

.NET and Visual Studio Elevation of Privilege Vulnerability

.NET and Visual Studio Elevation of Privilege Vulnerability

Record: BIT-dotnet-2021-31204
Updated: 2026-11-02

OSVBIT-dotnet-sdk-2021-31204 No score

.NET and Visual Studio Elevation of Privilege Vulnerability

.NET and Visual Studio Elevation of Privilege Vulnerability

Record: BIT-dotnet-sdk-2021-31204
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`dotnet` Bitnami	5.0.0 up to 5.0.6	5.0.6
`dotnet-sdk` Bitnami	5.0.0 up to 5.0.6	5.0.6
`rh-dotnet50-aspnetcore-runtime-5.0` Red Hat:rhel_dotnet:5.0::el7	before 0:5.0.6-1.el7_9	0:5.0.6-1.el7_9
`rh-dotnet50-aspnetcore-targeting-pack-5.0` Red Hat:rhel_dotnet:5.0::el7	before 0:5.0.6-1.el7_9	0:5.0.6-1.el7_9
`rh-dotnet50-dotnet` Red Hat:rhel_dotnet:5.0::el7	before 0:5.0.203-1.el7_9	0:5.0.203-1.el7_9
`rh-dotnet50-dotnet-apphost-pack-5.0` Red Hat:rhel_dotnet:5.0::el7	before 0:5.0.6-1.el7_9	0:5.0.6-1.el7_9
`rh-dotnet50-dotnet-debuginfo` Red Hat:rhel_dotnet:5.0::el7	before 0:5.0.203-1.el7_9	0:5.0.203-1.el7_9
`rh-dotnet50-dotnet-host` Red Hat:rhel_dotnet:5.0::el7	before 0:5.0.6-1.el7_9	0:5.0.6-1.el7_9
`rh-dotnet50-dotnet-hostfxr-5.0` Red Hat:rhel_dotnet:5.0::el7	before 0:5.0.6-1.el7_9	0:5.0.6-1.el7_9
`rh-dotnet50-dotnet-runtime-5.0` Red Hat:rhel_dotnet:5.0::el7	before 0:5.0.6-1.el7_9	0:5.0.6-1.el7_9

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Affected packages
Package	Affected	Fixed
`rh-dotnet50-dotnet-sdk-5.0` Red Hat:rhel_dotnet:5.0::el7	before 0:5.0.203-1.el7_9	0:5.0.203-1.el7_9
`rh-dotnet50-dotnet-targeting-pack-5.0` Red Hat:rhel_dotnet:5.0::el7	before 0:5.0.6-1.el7_9	0:5.0.6-1.el7_9
`rh-dotnet50-dotnet-templates-5.0` Red Hat:rhel_dotnet:5.0::el7	before 0:5.0.203-1.el7_9	0:5.0.203-1.el7_9
`rh-dotnet50-netstandard-targeting-pack-2.1` Red Hat:rhel_dotnet:5.0::el7	before 0:5.0.203-1.el7_9	0:5.0.203-1.el7_9
`rh-dotnet31-aspnetcore-runtime-3.1` Red Hat:rhel_dotnet:3.1::el7	before 0:3.1.15-1.el7_9	0:3.1.15-1.el7_9
`rh-dotnet31-aspnetcore-targeting-pack-3.1` Red Hat:rhel_dotnet:3.1::el7	before 0:3.1.15-1.el7_9	0:3.1.15-1.el7_9
`rh-dotnet31-dotnet` Red Hat:rhel_dotnet:3.1::el7	before 0:3.1.115-1.el7_9	0:3.1.115-1.el7_9
`rh-dotnet31-dotnet-apphost-pack-3.1` Red Hat:rhel_dotnet:3.1::el7	before 0:3.1.15-1.el7_9	0:3.1.15-1.el7_9
`rh-dotnet31-dotnet-debuginfo` Red Hat:rhel_dotnet:3.1::el7	before 0:3.1.115-1.el7_9	0:3.1.115-1.el7_9
`rh-dotnet31-dotnet-host` Red Hat:rhel_dotnet:3.1::el7	before 0:3.1.15-1.el7_9	0:3.1.15-1.el7_9
`rh-dotnet31-dotnet-hostfxr-3.1` Red Hat:rhel_dotnet:3.1::el7	before 0:3.1.15-1.el7_9	0:3.1.15-1.el7_9
`rh-dotnet31-dotnet-runtime-3.1` Red Hat:rhel_dotnet:3.1::el7	before 0:3.1.15-1.el7_9	0:3.1.15-1.el7_9
`rh-dotnet31-dotnet-sdk-3.1` Red Hat:rhel_dotnet:3.1::el7	before 0:3.1.115-1.el7_9	0:3.1.115-1.el7_9
`rh-dotnet31-dotnet-targeting-pack-3.1` Red Hat:rhel_dotnet:3.1::el7	before 0:3.1.15-1.el7_9	0:3.1.15-1.el7_9
`rh-dotnet31-dotnet-templates-3.1` Red Hat:rhel_dotnet:3.1::el7	before 0:3.1.115-1.el7_9	0:3.1.115-1.el7_9
`rh-dotnet31-netstandard-targeting-pack-2.1` Red Hat:rhel_dotnet:3.1::el7	before 0:3.1.115-1.el7_9	0:3.1.115-1.el7_9
`aspnetcore-runtime-5.0` Red Hat:enterprise_linux:8::appstream	before 0:5.0.6-1.el8_4	0:5.0.6-1.el8_4
`aspnetcore-targeting-pack-5.0` Red Hat:enterprise_linux:8::appstream	before 0:5.0.6-1.el8_4	0:5.0.6-1.el8_4
`dotnet` Red Hat:enterprise_linux:8::appstream	before 0:5.0.203-1.el8_4	0:5.0.203-1.el8_4
`dotnet-apphost-pack-5.0` Red Hat:enterprise_linux:8::appstream	before 0:5.0.6-1.el8_4	0:5.0.6-1.el8_4
`dotnet-apphost-pack-5.0-debuginfo` Red Hat:enterprise_linux:8::appstream	before 0:5.0.6-1.el8_4	0:5.0.6-1.el8_4
`dotnet-host` Red Hat:enterprise_linux:8::appstream	before 0:5.0.6-1.el8_4	0:5.0.6-1.el8_4
`dotnet-host-debuginfo` Red Hat:enterprise_linux:8::appstream	before 0:5.0.6-1.el8_4	0:5.0.6-1.el8_4
`dotnet-hostfxr-5.0` Red Hat:enterprise_linux:8::appstream	before 0:5.0.6-1.el8_4	0:5.0.6-1.el8_4
`dotnet-hostfxr-5.0-debuginfo` Red Hat:enterprise_linux:8::appstream	before 0:5.0.6-1.el8_4	0:5.0.6-1.el8_4
`dotnet-runtime-5.0` Red Hat:enterprise_linux:8::appstream	before 0:5.0.6-1.el8_4	0:5.0.6-1.el8_4
`dotnet-runtime-5.0-debuginfo` Red Hat:enterprise_linux:8::appstream	before 0:5.0.6-1.el8_4	0:5.0.6-1.el8_4
`dotnet-sdk-5.0` Red Hat:enterprise_linux:8::appstream	before 0:5.0.203-1.el8_4	0:5.0.203-1.el8_4
`dotnet-sdk-5.0-debuginfo` Red Hat:enterprise_linux:8::appstream	before 0:5.0.203-1.el8_4	0:5.0.203-1.el8_4
`dotnet-targeting-pack-5.0` Red Hat:enterprise_linux:8::appstream	before 0:5.0.6-1.el8_4	0:5.0.6-1.el8_4
`dotnet-templates-5.0` Red Hat:enterprise_linux:8::appstream	before 0:5.0.203-1.el8_4	0:5.0.203-1.el8_4
`dotnet5.0` Red Hat:enterprise_linux:8::appstream	before 0:5.0.203-1.el8_4	0:5.0.203-1.el8_4
`dotnet5.0-debuginfo` Red Hat:enterprise_linux:8::appstream	before 0:5.0.203-1.el8_4	0:5.0.203-1.el8_4
`dotnet5.0-debugsource` Red Hat:enterprise_linux:8::appstream	before 0:5.0.203-1.el8_4	0:5.0.203-1.el8_4
`netstandard-targeting-pack-2.1` Red Hat:enterprise_linux:8::appstream	before 0:5.0.203-1.el8_4	0:5.0.203-1.el8_4
`aspnetcore-runtime-3.1` Red Hat:enterprise_linux:8::appstream	before 0:3.1.15-1.el8_4	0:3.1.15-1.el8_4
`aspnetcore-targeting-pack-3.1` Red Hat:enterprise_linux:8::appstream	before 0:3.1.15-1.el8_4	0:3.1.15-1.el8_4
`dotnet-apphost-pack-3.1` Red Hat:enterprise_linux:8::appstream	before 0:3.1.15-1.el8_4	0:3.1.15-1.el8_4
`dotnet-apphost-pack-3.1-debuginfo` Red Hat:enterprise_linux:8::appstream	before 0:3.1.15-1.el8_4	0:3.1.15-1.el8_4
`dotnet-hostfxr-3.1` Red Hat:enterprise_linux:8::appstream	before 0:3.1.15-1.el8_4	0:3.1.15-1.el8_4
`dotnet-hostfxr-3.1-debuginfo` Red Hat:enterprise_linux:8::appstream	before 0:3.1.15-1.el8_4	0:3.1.15-1.el8_4
`dotnet-runtime-3.1` Red Hat:enterprise_linux:8::appstream	before 0:3.1.15-1.el8_4	0:3.1.15-1.el8_4
`dotnet-runtime-3.1-debuginfo` Red Hat:enterprise_linux:8::appstream	before 0:3.1.15-1.el8_4	0:3.1.15-1.el8_4
`dotnet-sdk-3.1` Red Hat:enterprise_linux:8::appstream	before 0:3.1.115-1.el8_4	0:3.1.115-1.el8_4
`dotnet-sdk-3.1-debuginfo` Red Hat:enterprise_linux:8::appstream	before 0:3.1.115-1.el8_4	0:3.1.115-1.el8_4
`dotnet-targeting-pack-3.1` Red Hat:enterprise_linux:8::appstream	before 0:3.1.15-1.el8_4	0:3.1.15-1.el8_4
`dotnet-templates-3.1` Red Hat:enterprise_linux:8::appstream	before 0:3.1.115-1.el8_4	0:3.1.115-1.el8_4
`dotnet3.1` Red Hat:enterprise_linux:8::appstream	before 0:3.1.115-1.el8_4	0:3.1.115-1.el8_4
`dotnet3.1-debuginfo` Red Hat:enterprise_linux:8::appstream	before 0:3.1.115-1.el8_4	0:3.1.115-1.el8_4
`dotnet3.1-debugsource` Red Hat:enterprise_linux:8::appstream	before 0:3.1.115-1.el8_4	0:3.1.115-1.el8_4

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-31204 is a high vulnerability (CVSS 7.3) in Microsoft .net, published May 11, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.19%, the 68th percentile. Fixed in dotnet 5.0.6.

References

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