CVE-2020-1476ASP.NET and .NET Elevation of Privilege Vulnerability
- 5.5MediumCVSS base score
- 1.2%Exploitation in 30 daysEPSS · top 32% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By microsoft
- 10 months later
· 10 months later
Published
- 4 years later
· 4 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
- EPSS (exploitation in 30 days)
- 1.2% · top 32% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
Microsoft · Microsoft .NET Framework 4.8
- affected 4.8.0 – < publication
Microsoft · Microsoft .NET Framework 3.5 AND 4.8
- affected 4.8.0 – < publication
Microsoft · Microsoft .NET Framework 2.0 Service Pack 2
- affected 2.0.0 – < publication
Microsoft · Microsoft .NET Framework 4.5.2
- affected 4.0.0.0 – < publication
Microsoft · Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2
- affected 4.0.0.0 – < publication
Microsoft · Microsoft .NET Framework 3.5 AND 4.7.2
- affected 4.7.0 – < publication
Microsoft · Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2
- affected 3.0.0.0 – < publication
Microsoft · Microsoft .NET Framework 3.5 AND 4.6/4.6.1/4.6.2
- affected 3.5.0 – < publication
Microsoft · Microsoft .NET Framework 3.5 AND 4.7.1/4.7.2
- affected 3.0 – < publication
Microsoft · Microsoft .NET Framework 4.6
- affected 4.0.0.0 – < publication
Microsoft · Microsoft .NET Framework 3.5
- affected 3.5.0 – < publication
Microsoft · Microsoft .NET Framework 3.5.1
- affected 3.5.0 – < publication
References
References1
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1476 (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2020-12350 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2020-1476)Record last updated .