CVE-2020-1476
ASP.NET and .NET Elevation of Privilege Vulnerability
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.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2020-1476- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - CVSS 2.0
- 2.1 Low
AV:L/AC:L/Au:N/C:P/I:N/A:N - Updated
- 2026-11-02
CVE List No score
ASP.NET and .NET Elevation of Privilege Vulnerability
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.
- Record
CVE-2020-1476- Updated
- 2026-11-02
EUVDEUVD-2020-12350 No score
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.
- Record
EUVD-2020-12350- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-8m4h-93rx-x9x3
An elevation of privilege vulnerability exists when ASP.NET or .NET web applications running on...
An elevation of privilege vulnerability exists when ASP.NET or .NET web applications running on IIS improperly allow access to cached files, aka 'ASP.NET and .NET Elevation of Privilege Vulnerability'.
- Record
GHSA-8m4h-93rx-x9x3- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-269
- Updated
- 2026-11-02
Affected products
- microsoft .net framework
- microsoft .net framework 2.0 service pack 2
- microsoft .net framework 3.5
- microsoft .net framework 3.5 and 4.6.2/4.7/4.7.1/4.7.2
- microsoft .net framework 3.5 and 4.6/4.6.1/4.6.2
- microsoft .net framework 3.5 and 4.7.1/4.7.2
- microsoft .net framework 3.5 and 4.7.2
- microsoft .net framework 3.5 and 4.8
- microsoft .net framework 3.5.1
- microsoft .net framework 4.5.2
- microsoft .net framework 4.6
- microsoft .net framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2
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History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-1476 is a medium vulnerability (CVSS 5.5) in Microsoft .net Framework, published August 17, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.13%, the 66th percentile. No source names a fixed version.