CVE-2020-1476: Microsoft .NET Framework

Medium severity, CVSS 5.5. EPSS: 1.1% chance of exploitation in the next 30 days.

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 products

• Microsoft .NET Framework: version 2.0 only; version 3.5 only; version 4.6.2 only; version 4.7 only; version 4.7.1 only; version 4.7.2 only; …

Published 2020-08-17. Last modified 2026-06-17.