CVE-2020-1161: microsoft asp.net_core
Vulnerability summary
CVE-2020-1161 is a high (CVSS 7.5) vulnerability in microsoft asp.net_core. EPSS estimates a 5.31% chance of exploitation in the next 30 days, higher than 92.5% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 2Timeline
- 21-05-2020PublishedVulnerability first disclosed.
- 19-08-2026Last modifiedVulnerability information updated.
Description
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 metrics
3 scores · 2 sources · 2 versions- OSV · NugetEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
5.31%
Chance of exploitation in the next 30 days
Percentile
93%
Versus all other CVEs
30-day change
+0.17 pp
From 5.14% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
NuGet9 products
- Microsoft.AspNetCore.App.Runtime.linux-arm≥ 3.1.0, < 3.1.4
- Microsoft.AspNetCore.App.Runtime.linux-arm64≥ 3.1.0, < 3.1.4
- Microsoft.AspNetCore.App.Runtime.linux-musl-arm64≥ 3.1.0, < 3.1.4
- Microsoft.AspNetCore.App.Runtime.linux-musl-x64≥ 3.1.0, < 3.1.4
- Microsoft.AspNetCore.App.Runtime.linux-x64≥ 3.1.0, < 3.1.4
Microsoft8 products
- asp.net_core3.1
- asp.net core 3.1≥ 3.0, < publication
- microsoft visual studio 2017 version 15.9 (includes 15.0 - 15.8)≥ 15.9.0, < publication
- microsoft visual studio 2019 version 16.0≥ 16.0, < publication
- microsoft visual studio 2019 version 16.4 (includes 16.0 - 16.3)≥ 16.0, < publication
2 vendors · 17 products
References
4 links
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1161X Refsource MISCX TransferredWEBPatchVendor Advisory
