CVE-2020-1161

mediumpriority · track · 32EPSS 0.053 · 93 %ileEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

5.31% (93rd) EPSS

CVSS 5 · medium

Is it mine?

23 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · osv

EPSS · scored 2026-10-23

A denial of service vulnerability exists when ASP.NET Core improperly handles web requests. An attacker who successfully exploited this vulnerability could cause a denial of service against an ASP.NET Core web application. The vulnerability can be exploited remotely, without authentication. A remote unauthenticated attacker could exploit this vulnerability by issuing specially crafted requests to the ASP.NET Core application. The update addresses the vulnerability by correcting how the ASP.NET Core web application handles web requests.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.5

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 10 · impact 2.9

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.17.5highAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · OSV

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20USCWE-20US

affected products (23)

Products and version ranges known to be affected.

Microsoft ASP.NET Core≤ 3.1enisa_euvdEU
Microsoft Microsoft Visual Studio 2017 version 15.9 (includes 15.1 - 15.8)≤ unspecifiedenisa_euvdEU
Microsoft Microsoft Visual Studio 2019≤ 16.0enisa_euvdEU
Microsoft Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3)≤ unspecifiedenisa_euvdEU
Microsoft Microsoft Visual Studio 2019 version 16.5≤ unspecifiedenisa_euvdEU
Microsoft Corp ASP.NET Core≤ 3.1fstec_bduRU
Microsoft Corp Microsoft Visual Studio 201715.1 → 15.9fstec_bduRU
Microsoft Corp Microsoft Visual Studio 2019≤ 16.5fstec_bduRU
Microsoft Corp Microsoft Visual Studio 2019≤ 16.0fstec_bduRU
Microsoft Corp Microsoft Visual Studio 201916.0 → 16.4fstec_bduRU
microsoft asp.net core= 3.1nvdUScpe:2.3:a:microsoft:asp.net_core:*:*:*:*:*:*:*:*
microsoft visual studio 201715.1 → 15.9nvdUScpe:2.3:a:microsoft:visual_studio_2017:*:*:*:*:*:*:*:*
microsoft visual studio 201916.0 → 16.5nvdUScpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*
Bitnami aspnet-core3.1.0 → 3.1.1osvUSpkg:bitnami/aspnet-core
NuGet Microsoft.AspNetCore.App.Runtime.linux-arm3.1.0 → 3.1.4osvUSpkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-arm
NuGet Microsoft.AspNetCore.App.Runtime.linux-arm643.1.0 → 3.1.4osvUSpkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-arm64
NuGet Microsoft.AspNetCore.App.Runtime.linux-musl-arm643.1.0 → 3.1.4osvUSpkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-musl-arm64
NuGet Microsoft.AspNetCore.App.Runtime.linux-musl-x643.1.0 → 3.1.4osvUSpkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-musl-x64
NuGet Microsoft.AspNetCore.App.Runtime.linux-x643.1.0 → 3.1.4osvUSpkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-x64
NuGet Microsoft.AspNetCore.App.Runtime.osx-x643.1.0 → 3.1.4osvUSpkg:nuget/Microsoft.AspNetCore.App.Runtime.osx-x64

showing 20 of 23

advisories (2)

Vendor and ecosystem advisories describing this.

GHSA-3cf7-7wq6-8842ASP.NET Core Denial of Service Vulnerability2022-05-24ghsa · osvUS
A denial of service vulnerability exists when ASP.NET Core improperly handles web requests, aka 'ASP.NET Core Denial of Service Vulnerability'.
BIT-aspnet-core-2020-1161ASP.NET Core Denial of Service Vulnerability2024-03-06vendor · osvUS
A denial of service vulnerability exists when ASP.NET Core improperly handles web requests. An attacker who successfully exploited this vulnerability could cause a denial of service against an ASP.NET Core web application. The vulnerability can be exploited remotely, without authentication. A remote unauthenticated attacker could exploit this vulnerability by issuing specially crafted requests to the ASP.NET Core application. The update addresses the vulnerability by correcting how the ASP.NET Core web application handles web requests.

also known as (6)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu osv nvd NVD CVE.org MITRE

published 2020-05-21modified 2026-08-19

references (11)

External citations — patches, advisories, analysis.

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