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CVE-2020-1045

Microsoft ASP.NET Core Security Feature Bypass Vulnerability

Published: Sep 11, 2020Updated: Feb 23, 2026 Sources: CVE List NVD GHSA BDUNVD-CWE-noinfo
7.5HIGH
NVD MITRE
EPSS Score
6.0%
Top 7.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

Cookie parsing failure

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:HIntegrity
High
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

NVD-CWE-noinfo

Affected Products

NuGet
package-ecosystem
Microsoft.AspNetCore.Http
OSS Libraries
Microsoft.AspNetCore.App
OSS Libraries
Microsoft.Owin
OSS Libraries
Microsoft.AspNetCore.App.Runtime.linux-arm
OSS Libraries
Microsoft.AspNetCore.App.Runtime.linux-arm64
OSS Libraries
Microsoft.AspNetCore.App.Runtime.linux-musl-x64
OSS Libraries
Microsoft.AspNetCore.App.Runtime.linux-x64
OSS Libraries
Microsoft.AspNetCore.App.Runtime.osx-x64
OSS Libraries
Microsoft Corp
commercial·USaka Microsoft, microsoft corporation
ASP.NET CoreLibraryLibrary
OSS Libraries / web-framework
ASP.NET Core 2.1On-premLibrary
OSS Libraries / web-framework
ASP.NET Core 3.1On-premLibrary
OSS Libraries / web-framework
redhat
commercial·USaka red hat
enterprise linux eusOn-premOS
Operating Systems / linux-distro
enterprise linux ausOn-prem
Operating Systems / linux-distro
enterprise linux tusOn-prem
Operating Systems / linux-distro
fedoraproject
oss-project·USaka fedora project
fedoraOn-premOS
Operating Systems / linux-distro
and 7 more affected products View all →

Exploitability

Official Patch Available
Is your org exposed to CVE-2020-1045?We can run the check for you — a free external exposure review, no install. Check my exposure

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1045
portal.msrc.microsoft.com
https://nvd.nist.gov/vuln/detail/CVE-2020-1045
nvd.nist.gov
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1045
portal.msrc.microsoft.com
and 14 more references View all →

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