GHSA-vgwq-hfqc-58wvPublished

.NET Core and Visual Studio Information Disclosure Vulnerability

Collected exploitation and prediction evidence

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

CVE-2021-34485

No KEV entry is attached to this observation; this is not evidence that exploitation is absent.

FIRST EPSS: 2.07 % · percentile 81.55 % · scored 10 Nov 2026.

Observed 10 Nov 2026 20:24:10 UTC · Complete immutable risk JSON

cve-program · CVE-2021-34485

Published

.NET Core and Visual Studio Information Disclosure Vulnerability

Source published: 12 Aug 2021 18:11:57 UTC
Source modified: 7 Oct 2026 16:10:01 UTC
Observed here: 23 Oct 2026 15:48:27 UTC
Source terms: CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: cve-program · CVE Program Terms of Use. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 3.1 · 5.0 CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C

euvd · EUVD-2022-7165

Published

.NET Core and Visual Studio Information Disclosure Vulnerability

EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.

Original publisher date fields

datePublished: Aug 12, 2021, 6:11:57 PM

dateUpdated: Oct 7, 2026, 4:10:01 PM

7 related source bulletins · separate from aliases

RHSA-2021:3145: Red Hat Security Advisory: .NET Core 2.1 security and bugfix update

CVE-2021-34485

RHSA-2021:3148: Red Hat Security Advisory: .NET 5.0 security and bugfix update

CVE-2021-26423 · CVE-2021-34485 · CVE-2021-34532

RHSA-2021:3142: Red Hat Security Advisory: .NET Core 3.1 security and bugfix update

CVE-2021-26423 · CVE-2021-34485 · CVE-2021-34532

msrc_CVE-2021-34485: .NET Core and Visual Studio Information Disclosure Vulnerability

CVE-2021-34485

RHSA-2021:3144: Red Hat Security Advisory: .NET Core 2.1 on Red Hat Enterprise Linux security and bugfix update

CVE-2021-34485

RHSA-2021:3147: Red Hat Security Advisory: .NET 5.0 on RHEL 7 security and bugfix update

CVE-2021-26423 · CVE-2021-34485 · CVE-2021-34532

RHSA-2021:3143: Red Hat Security Advisory: .NET Core 3.1 on RHEL 7 security and bugfix update

CVE-2021-26423 · CVE-2021-34485 · CVE-2021-34532

Source published: Aug 12, 2021, 6:11:57 PM (timezone not stated)
Source modified: Oct 7, 2026, 4:10:01 PM (timezone not stated)
Observed here: 9 Nov 2026 22:13:26 UTC
Source terms: ENISA EUVD · source terms and attribution apply

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: euvd · ENISA EUVD · source terms and attribution apply. Source text is retained; field grouping and change labels are provided by ChangeIntel.

EUVD CVSS 3.1 · 5.0 CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C

nvd · CVE-2021-34485

Published

.NET Core and Visual Studio Information Disclosure Vulnerability

NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Modified

Weakness classifications: NVD-CWE-noinfo · CWE-200

Original publisher date fields

published: 2021-08-12T18:15:09.157

lastModified: 2026-10-07T17:16:42.997

5 source CPE criteria · context only

cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:.net_core:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:powershell_core:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:visual_studio_2017:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*

The original JSON retains the logical configuration operators, exclusions and version bounds.

Source published: 12 Aug 2021 18:15:09 UTC
Source modified: 7 Oct 2026 17:16:42 UTC
Observed here: 24 Oct 2026 18:17:33 UTC
Source terms: NIST NVD usage terms; underlying source attribution retained

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: nvd · NIST NVD usage terms; underlying source attribution retained. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 3.1 · [email protected] · Secondary · 5.0 CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N

CVSS 3.1 · [email protected] · Secondary · 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS 3.1 · 134c704f-9b21-4f2e-91b3-4a467353bcc0 · Secondary · 5.0 CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N

CVSS 2.0 · [email protected] · Primary · 2.1 AV:L/AC:L/Au:N/C:P/I:N/A:N

osv · GHSA-vgwq-hfqc-58wv

Published

Microsoft is releasing this security advisory to provide information about a vulnerability in .NET 5.0, .NET Core 3.1 and .NET Core 2.1. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. An information disclosure vulnerability exists in .NET 5.0, .NET Core 3.1 and .NET Core 2.1 when dumps created by the tool to collect crash dumps and dumps on demand are created with global read permissions on Linux and macOS. ### Patches * If you're using .NET 5.0, you should download and install Runtime 5.0.9 or SDK 5.0.206 (for Visual Studio 2019 v16.8) or SDK 5.0.303 (for Visual Studio 2019 V16.10) from https://dotnet.microsoft.com/download/dotnet-core/5.0. * If you're using .NET Core 3.1, you should download and install Runtime 3.1.18 or SDK 3.1.118 (for Visual Studio 2019 v16.4) or 3.1.412 (for Visual Studio 2019 v16.7 or later) from https://dotnet.microsoft.com/download/dotnet-core/3.1. * If you're using .NET Core 2.1, you should download and install Runtime 2.1.29 or SDK 2.1.525 (for Visual Studio 2019 v15.9) or 2.1.817 from https://dotnet.microsoft.com/download/dotnet-core/2.1. #### Other Details - Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/196 - An Issue for this can be found at https://github.com/dotnet/runtime/issues/57174 - MSRC details for this can be found at https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-34485

Source published: 20 Oct 2022 21:34:09 UTC
Source modified: 6 Dec 2024 05:38:33 UTC
Observed here: 23 Oct 2026 16:01:25 UTC
Source terms: GitHub Advisory Database · CC-BY-4.0

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · GitHub Advisory Database · CC-BY-4.0. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS_V3 · CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Publisher rating · MODERATE