CVE-2020-1476

ASP.NET and .NET Elevation of Privilege Vulnerability

MEDIUM

5.5

CVSS Score

Published: August 17, 2020 at 07:13 PM UTC

Updated: June 17, 2026 at 03:01 AM UTC

10 products affected across 1 vendor.NET Framework.netWindows Server 2016

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Severity

MEDIUM5.5

Exploit prediction

EPSS 1%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

.net · Microsoft

95%

2.0 3.5 3.5.1 4.7.2 4.8

.NET Framework · Microsoft

95%

2.0.0 ≤ v < publication3.0 ≤ v < publication3.0.0.0 ≤ v < publication3.5.0 ≤ v < publication4.0.0.0 ≤ v < publication4.7.0 ≤ v < publication4.8.0 ≤ v < publication2.0 sp2 2.0.0 3.0 3.0.0.0 3.5 3.5.0 3.5.1 4.0.0.0 4.5.2 4.6 4.6.1 4.6.2 4.7 4.7.0 4.7.1 4.7.2 4.8 4.8.0

Affected range stops below publication, so it looks safe — our inference, not a vendor statement

microsoft-windows-10 (environment) · microsoft-windows-7 (environment) · microsoft-windows-8-1 (environment) · microsoft-windows-rt-8-1 (environment) · microsoft-windows-server-2008 (environment) · microsoft-windows-server-2012 (environment) · microsoft-windows-server-2016 (environment) · microsoft-windows-server-2019 (environment)

Windows 10 · Microsoftdevice

80%

All versions

Windows 7 · Microsoftdevice

80%

All versions

Windows 8-1 · Microsoftdevice

80%

All versions

Windows Rt 8-1 · Microsoftdevice

80%

All versions