CVE-2020-1476 json
ASP.NET and .NET Elevation of Privilege Vulnerability
published 6y ago modified 4mo ago also EUVD-2020-12350
- cvss
- 5.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.1%
- EPSS 1.1% chance of exploitation in 30 days, percentile 66%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
Is CVE-2020-1476 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerExploit prediction
1.13% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
| NVD | 2.0 | 2.1 | AV:L/AC:L/Au:N/C:P/I:N/A:N |
Affected products
- Microsoft Microsoft .NET Framework 4.8
- Microsoft Microsoft .NET Framework 3.5 AND 4.8
- Microsoft Microsoft .NET Framework 2.0 Service Pack 2
- Microsoft Microsoft .NET Framework 4.5.2
- Microsoft Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2
- Microsoft Microsoft .NET Framework 3.5 AND 4.7.2
- Microsoft Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2
- Microsoft Microsoft .NET Framework 3.5 AND 4.6/4.6.1/4.6.2
- Microsoft Microsoft .NET Framework 3.5 AND 4.7.1/4.7.2
- Microsoft Microsoft .NET Framework 4.6
- Microsoft Microsoft .NET Framework 3.5
- Microsoft Microsoft .NET Framework 3.5.1
References
-
portal.msrc.microsoft.com
/en-US/security-guidance/advisory/CVE-2020-1476
patch, vendor-advisory
Sources
- CVE List CVE-2020-1476
- NVD CVE-2020-1476
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.