CVE-2021-34485

MEDIUMCVSS 5.0

5.0

.NET Core and Visual Studio Information Disclosure Vulnerability

CVSS v3: 5.0
EG Score: —
EPSS: —
KEV: Not listed

Published

August 12, 2021

Last Modified

November 21, 2024

References (2)

secure@microsofthttps://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34485
af854a3a-2127-422b-91ae-364da2661108https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34485

Patch Availability(6)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
redhat	dotnet5.0-0:5.0.206-1.el8_4	2021-08-12	redhat
redhat	rh-dotnet50-dotnet-0:5.0.206-1.el7_9	2021-08-12	redhat
redhat	dotnet3.1-0:3.1.118-1.el8_4	2021-08-11	redhat
redhat	dotnet-0:2.1.525-1.el8_4	2021-08-11	redhat
redhat	rh-dotnet21-dotnet-0:2.1.525-1.el7_9	2021-08-11	redhat
redhat	rh-dotnet31-dotnet-0:3.1.118-1.el7_9	2021-08-11	redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(24 across 1 ecosystem)

NuGet(24)

Package	Vulnerable range	Fixed in	Dependents
Microsoft.NETCore.App	2.1.0 ... 2.1.9 (29 versions)	2.1.29	—
Microsoft.NETCore.App.Runtime.linux-arm	5.0.0 ... 5.0.8 (9 versions)	5.0.9	—
Microsoft.NETCore.App.Runtime.linux-arm64	5.0.0 ... 5.0.8 (9 versions)	5.0.9	—
Microsoft.NETCore.App.Runtime.linux-musl-arm	5.0.0 ... 5.0.8 (9 versions)	5.0.9	—
Microsoft.NETCore.App.Runtime.linux-musl-arm64	5.0.0 ... 5.0.8 (9 versions)	5.0.9	—
Microsoft.NETCore.App.Runtime.linux-musl-x64	5.0.0 ... 5.0.8 (9 versions)	5.0.9	—
Microsoft.NETCore.App.Runtime.linux-x64	5.0.0 ... 5.0.8 (9 versions)	5.0.9	—
Microsoft.NETCore.App.Runtime.Mono.linux-arm	5.0.0 ... 5.0.8 (9 versions)	5.0.9	—
Microsoft.NETCore.App.Runtime.Mono.linux-arm64	5.0.0 ... 5.0.8 (9 versions)	5.0.9	—
Microsoft.NETCore.App.Runtime.Mono.linux-musl-x64	5.0.0 ... 5.0.8 (9 versions)	5.0.9	—
Microsoft.NETCore.App.Runtime.Mono.linux-x64	5.0.0 ... 5.0.8 (9 versions)	5.0.9	—
Microsoft.NETCore.App.Runtime.Mono.LLVM.AOT.linux-arm64	5.0.0 ... 5.0.8 (9 versions)	5.0.9	—
Microsoft.NETCore.App.Runtime.Mono.LLVM.AOT.linux-x64	5.0.0 ... 5.0.8 (9 versions)	5.0.9	—
Microsoft.NETCore.App.Runtime.Mono.LLVM.AOT.osx-x64	5.0.0 ... 5.0.8 (9 versions)	5.0.9	—
Microsoft.NETCore.App.Runtime.Mono.LLVM.linux-arm64	5.0.0 ... 5.0.8 (9 versions)	5.0.9	—
Microsoft.NETCore.App.Runtime.Mono.LLVM.linux-x64	5.0.0 ... 5.0.8 (9 versions)	5.0.9	—
Microsoft.NETCore.App.Runtime.Mono.LLVM.osx-x64	5.0.0 ... 5.0.8 (9 versions)	5.0.9	—
Microsoft.NETCore.App.Runtime.Mono.osx-x64	5.0.0 ... 5.0.8 (9 versions)	5.0.9	—
Microsoft.NETCore.App.Runtime.osx-x64	5.0.0 ... 5.0.8 (9 versions)	5.0.9	—
Microsoft.NETCore.App.Runtime.rhel.6-x64	3.1.0 ... 3.1.9 (18 versions)	3.1.18	—
Microsoft.NETCore.App.Runtime.win-arm	5.0.0 ... 5.0.8 (9 versions)	5.0.9	—
Microsoft.NETCore.App.Runtime.win-arm64	5.0.0 ... 5.0.8 (9 versions)	5.0.9	—
Microsoft.NETCore.App.Runtime.win-x64	5.0.0 ... 5.0.8 (9 versions)	5.0.9	—
Microsoft.NETCore.App.Runtime.win-x86	5.0.0 ... 5.0.8 (9 versions)	5.0.9	—

All Vendor Advisories

(7)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 6× in last 7d / 6× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 12:10 UTCEG score recompute
2026-05-26 12:10 UTCVendor advisory

Frequently asked(4)

What is CVE-2021-34485?

CVE-2021-34485 is a medium vulnerability published on August 12, 2021. .NET Core and Visual Studio Information Disclosure Vulnerability

When was CVE-2021-34485 disclosed?

CVE-2021-34485 was first published in the National Vulnerability Database on August 12, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

What is the CVSS score of CVE-2021-34485?

CVE-2021-34485 has a CVSS v3 base score of 5.0 (NVD).

How do I remediate CVE-2021-34485?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-34485, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2021-34485

Explore →

Is Your Infrastructure Affected by CVE-2021-34485?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs

CVE-2021-34485

📅 Published

🔄 Last Modified

🔗 References (2)