CVE-2019-0545: Microsoft .net Core

High severity, CVSS 7.5. EPSS: 9.6% chance of exploitation in the next 30 days.

An information disclosure vulnerability exists in .NET Framework and .NET Core which allows bypassing Cross-origin Resource Sharing (CORS) configurations, aka ".NET Framework Information Disclosure Vulnerability." This affects Microsoft .NET Framework 2.0, Microsoft .NET Framework 3.0, Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2, 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, Microsoft .NET Framework 4.7/4.7.1/4.7.2, .NET Core 2.1, Microsoft .NET Framework 4.7.1/4.7.2, Microsoft .NET Framework 3.5, Microsoft .NET Framework 3.5.1, Microsoft .NET Framework 4.6/4.6.1/4.6.2, .NET Core 2.2, Microsoft .NET Framework 4.7.2.

Affected products

• Microsoft .net Core: version 2.1 only; version 2.2 only
• Microsoft .NET Framework: version 2.0 only; version 3.0 only; version 3.5 only; version 3.5.1 only; version 4.5.2 only; version 4.6.2 only; …

Published 2019-01-08. Last modified 2026-06-17.