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CVE-2020-0603

30
FAUCET Score

CVE-2020-0603 is a remote code execution vulnerability in ASP.NET Core that arises from improper memory handling, allowing an attacker to execute arbitrary code in the context of the current user. This vulnerability affects various Microsoft and Red Hat ASP.NET Core and Enterprise Linux products. With a CVSS score of 8.8 (HIGH), it has a network attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability. Despite its high severity and FAUCET Risk Score of 85/100, there is no evidence of active exploitation, nor are public exploit tools like Metasploit or Nuclei available. Community discussion and media coverage are minimal, suggesting limited public attention.

Impacted Technologies

VendorProductVersion(s)CPE
2.1CPE matchmatch criteria
cpe:2.3:a:microsoft:asp.net_core:2.1:*:*:*:*:*:*:*
3.0CPE matchmatch criteria
cpe:2.3:a:microsoft:asp.net_core:3.0:*:*:*:*:*:*:*
3.1CPE matchmatch criteria
cpe:2.3:a:microsoft:asp.net_core:3.1:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
8.1CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_eus:8.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
19.83%
Probability of exploitation in next 30 days
EPSS Percentile
97.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.1983 is in the 97th percentile among its peer group of 14,855 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 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 3.0
View patch
microsoftpatch availablevia msrc
Product: ASP.NET Core 3.1
View patch
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.AppFixed in: 3.0.1
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.Http.ConnectionsFixed in: 1.0.15
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.App.Runtime.linux-armFixed in: 3.1.1
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.App.Runtime.linux-arm64Fixed in: 3.1.1
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.App.Runtime.linux-musl-arm64Fixed in: 3.1.1
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.App.Runtime.linux-musl-x64Fixed in: 3.1.1
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.App.Runtime.linux-x64Fixed in: 3.1.1
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.App.Runtime.osx-x64Fixed in: 3.1.1
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.App.Runtime.win-armFixed in: 3.1.1
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.App.Runtime.win-x64Fixed in: 3.1.1
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.App.Runtime.win-x86Fixed in: 3.1.1
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.AllFixed in: 2.1.15
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.AppFixed in: 3.1.1
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.AppFixed in: 2.1.15
redhatpatch availablevia redhat_api
Product: .NET Core on Red Hat Enterprise LinuxFixed in: rh-dotnet30-dotnet-0:3.0.102-3.el7
View patch
redhatpatch availablevia redhat_api
Product: .NET Core on Red Hat Enterprise LinuxFixed in: rh-dotnet31-dotnet-0:3.1.101-4.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: dotnet3.0-0:3.0.102-2.el8_1
View patch

Vendor Advisories (3)

nugetGHSA-655q-9gvg-q4cmhigh

Remote code execution in ASP.NET Core

May 24, 2022
microsoft2020-Jan/CVE-2020-0603Critical

ASP.NET Core Remote Code Execution Vulnerability

Jan 14, 2020
redhatCVE-2020-0603Critical

dotnet: Memory Corruption in SignalR

Jan 14, 2020

References

access.redhat.com / errata/RHSA-2020:0130
Third Party Advisory
access.redhat.com / errata/RHSA-2020:0134
Third Party Advisory
portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2020-0603
PatchVendor Advisory