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CVE-2020-1476

ASP.NET and .NET Elevation of Privilege Vulnerability

Published: Aug 17, 2020Updated: Feb 23, 2026 Sources: CVE List NVD BDUNVD-CWE-noinfo
NVD MITRE
5.5CVSSMEDIUM
EPSS Score
1.1%
Top 37.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

An elevation of privilege vulnerability exists when ASP.NET or .NET web applications running on IIS improperly allow access to cached files. An attacker who successfully exploited this vulnerability could gain access to restricted files. To exploit this vulnerability, an attacker would need to send a specially crafted request to an affected server. The update addresses the vulnerability by changing how ASP.NET and .NET handle requests.

CVSS Vector Breakdown

AV:LAC:LPR:LUI:NS:UC:HI:NA:N
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

NVD-CWE-noinfo

Affected Products

Microsoft .NET Framework 4.8Microsoft
On-premOS
Operating Systems / windows
Microsoft .NET Framework 3.5 AND 4.8Microsoft
LibraryLibrary
OSS Libraries / generic-library
Microsoft .NET Framework 2.0 Service Pack 2Microsoft
LibraryLibrary
OSS Libraries / generic-library
Microsoft .NET Framework 4.5.2Microsoft
LibraryLibrary
OSS Libraries / generic-library
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2Microsoft
LibraryLibrary
OSS Libraries / generic-library
microsoftcommercialUSOperating Systems
and 19 more affected products View all →

Exploitability

Official Patch Available

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1476
portal.msrc.microsoft.com
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1476
portal.msrc.microsoft.com
https://nvd.nist.gov/vuln/detail/CVE-2020-1476
nvd.nist.gov

Timeline

Published
Aug 17, 2020
Last Updated
Feb 23, 2026

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