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CVE-2020-1597

21
FAUCET Score

CVE-2020-1597 is a denial-of-service vulnerability in ASP.NET Core applications, affecting various Microsoft and Fedora products, including Visual Studio. An unauthenticated remote attacker can exploit this by sending specially crafted web requests, leading to a high-severity denial of service with a CVSS score of 7.5. While there is no known active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered some community discussion and media coverage. Organizations should prioritize patching to mitigate this risk.

Impacted Technologies

VendorProductVersion(s)CPE
2.1CPE matchmatch criteria
cpe:2.3:a:microsoft:asp.net_core:2.1:*:*:*:*:*:*:*
3.1CPE matchmatch criteria
cpe:2.3:a:microsoft:asp.net_core:3.1:*:*:*:*:*:*:*
>= 15.0, <= 15.8CPE matchmatch criteria
cpe:2.3:a:microsoft:visual_studio_2017:*:*:*:*:*:*:*:*
>= 16.0, <= 16.3CPE matchmatch criteria
cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*
>= 16.5, <= 16.6CPE matchmatch criteria
cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
6.56%
Probability of exploitation in next 30 days
EPSS Percentile
93.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0656 is in the 88th percentile among its peer group of 51,551 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (21)

microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: ASP.NET Core 2.1
View patch
microsoftpatch availablevia msrc
Product: ASP.NET Core 3.1
View patch
microsoftpatch availablevia msrc
Product: Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3)
View patch
microsoftpatch availablevia msrc
Product: Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8)
View patch
microsoftpatch availablevia msrc
Product: Microsoft Visual Studio 2019 version 16.0
View patch
microsoftpatch availablevia msrc
Product: Microsoft Visual Studio 2019 version 16.7 (includes 16.0 – 16.6)
View patch
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.App.Runtime.linux-x64Fixed in: 3.1.7
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.App.Runtime.osx-x64Fixed in: 3.1.7
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.App.Runtime.win-armFixed in: 3.1.7
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.App.Runtime.win-arm64Fixed in: 3.1.7
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.App.Runtime.win-x64Fixed in: 3.1.7
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.App.Runtime.win-x86Fixed in: 3.1.7
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.App.Runtime.linux-musl-arm64Fixed in: 3.1.7
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.App.Runtime.linux-musl-x64Fixed in: 3.1.7
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.AppFixed in: 2.1.21
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.AllFixed in: 2.1.21
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.App.Runtime.linux-armFixed in: 3.1.7
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.App.Runtime.linux-arm64Fixed in: 3.1.7
redhatpatch availablevia redhat_api
Product: .NET Core on Red Hat Enterprise LinuxFixed in: rh-dotnet31-dotnet-0:3.1.107-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: dotnet3.1-0:3.1.107-1.el8_2
View patch

Vendor Advisories (3)

nugetGHSA-f8qx-mjcq-wfgxhigh

ASP.NET Core Denial of Service Vulnerability

May 24, 2022
redhatCVE-2020-1597Important

dotnet: ASP.NET Core Resource Consumption Denial of Service

Aug 11, 2020
microsoft2020-Aug/CVE-2020-1597Important

ASP.NET Core Denial of Service Vulnerability

Aug 11, 2020

References

lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/WH5FQ5VT3JGHXFXOETHCTBWJUIAPGHHT
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/ZW4CBI26KSO3PRL3HLVVISXPPOYUHSXO
portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2020-1597
PatchVendor Advisory