An information disclosure vulnerability exists in .NET Framework and .NET Core which allows bypassing Cross-origin Resource Sharing (CORS)…

Description

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.

Scores

EPSS (exploitation in 30 days)

9.6% · top 4.5% of all CVEs (5 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.

Weakness

• Information Disclosure
• CWE-200 (opens in a new tab)All about CWE-200 and its CVEs

Affected products

• Microsoft · .NET Core

  • affected 2.1
  • affected 2.2

• Microsoft · Microsoft .NET Framework

  • affected 2.0 Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2
  • affected 2.0 Service Pack 2 on Windows Server 2008 for Itanium-Based Systems Service Pack 2
  • affected 2.0 Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2
  • affected 3.0 Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2
  • affected 3.0 Service Pack 2 on Windows Server 2008 for Itanium-Based Systems Service Pack 2
  • affected 3.0 Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2
  • affected 3.5 on Windows 10 for 32-bit Systems
  • affected 3.5 on Windows 10 for x64-based Systems
  • affected 3.5 on Windows 10 Version 1607 for 32-bit Systems
  • affected 3.5 on Windows 10 Version 1607 for x64-based Systems
  • affected 3.5 on Windows 10 Version 1703 for 32-bit Systems
  • affected 3.5 on Windows 10 Version 1703 for x64-based Systems
  • affected 3.5 on Windows 10 Version 1709 for 32-bit Systems
  • affected 3.5 on Windows 10 Version 1709 for ARM64-based Systems
  • affected 3.5 on Windows 10 Version 1709 for x64-based Systems
  • affected 3.5 on Windows 10 Version 1803 for 32-bit Systems
  • affected 3.5 on Windows 10 Version 1803 for ARM64-based Systems
  • affected 3.5 on Windows 10 Version 1803 for x64-based Systems
  • affected 3.5 on Windows 10 Version 1809 for 32-bit Systems
  • affected 3.5 on Windows 10 Version 1809 for x64-based Systems
  • affected 3.5 on Windows 8.1 for 32-bit systems
  • affected 3.5 on Windows 8.1 for x64-based systems
  • affected 3.5 on Windows Server 2012
  • affected 3.5 on Windows Server 2012 (Server Core installation)
  • affected 3.5 on Windows Server 2012 R2
  • affected 3.5 on Windows Server 2012 R2 (Server Core installation)
  • affected 3.5 on Windows Server 2016
  • affected 3.5 on Windows Server 2016 (Server Core installation)
  • affected 3.5 on Windows Server 2019
  • affected 3.5 on Windows Server 2019 (Server Core installation)
  • affected 3.5 on Windows Server, version 1709 (Server Core Installation)
  • affected 3.5 on Windows Server, version 1803 (Server Core Installation)
  • affected 3.5.1 on Windows 7 for 32-bit Systems Service Pack 1
  • affected 3.5.1 on Windows 7 for x64-based Systems Service Pack 1
  • affected 3.5.1 on Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1
  • affected 3.5.1 on Windows Server 2008 R2 for x64-based Systems Service Pack 1
  • affected 3.5.1 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
  • affected 4.5.2 on Windows 7 for 32-bit Systems Service Pack 1
  • affected 4.5.2 on Windows 7 for x64-based Systems Service Pack 1
  • affected 4.5.2 on Windows 8.1 for 32-bit systems
  • and 43 more

Affected packages

From reviewed advisories of the GitHub Advisory Database.

• NuGetMicrosoft.NETCore.AppGHSA-2xjx-v99w-gqf3 (opens in a new tab)

References (3)

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0545 (opens in a new tab)x_refsource_CONFIRMx_transferred
• 106405 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
• RHSA-2019:0040 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_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)
• OSV.dev (opens in a new tab)
• GitHub Advisory GHSA-2xjx-v99w-gqf3 (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2019-0545](https://trackcve.app/badge/CVE-2019-0545.svg)](https://trackcve.app/cve/CVE-2019-0545)

Record last updated 4 Aug 2024, 17:51 UTC.