CVE-2025-21172

.NET and Visual Studio Remote Code Execution Vulnerability

Microsoft Security Advisory CVE-2025-21172 | .NET and Visual Studio Remote Code Execution Vulnerability

<a name="executive-summary"></a>Executive summary

Microsoft is releasing this security advisory to provide information about a vulnerability in .NET 8.0 and .NET 9.0. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.

An attacker could exploit this vulnerability by loading a specially crafted file in Visual Studio.

Announcement

Announcement for this issue can be found at https://github.com/dotnet/runtime/issues/111424.

<a name="mitigation-factors"></a>Mitigation factors

Microsoft has not identified any mitigating factors for this vulnerability.

<a name="affected-software"></a>Affected software

• Any .NET 8.0 application running on .NET 8.0.11 or earlier.
• Any .NET 9.0 application running on .NET 9.0.0 or earlier.

<a name="affected-packages"></a>Affected Packages

The vulnerability affects any Microsoft .NET project if it uses any of affected packages versions listed below

<a name=".NET 9"></a>.NET 9

Package name | Affected version | Patched version ------------ | ---------------- | ------------------------- Microsoft.NetCore.App.Runtime.linux-arm | >= 9.0.0, < 9.0.1 | 9.0.1 Microsoft.NetCore.App.Runtime.linux-arm64 | >= 9.0.0, < 9.0.1 | 9.0.1 Microsoft.NetCore.App.Runtime.linux-musl-arm | >= 9.0.0, < 9.0.1 | 9.0.1 Microsoft.NetCore.App.Runtime.linux-musl-arm64 | >= 9.0.0, < 9.0.1 | 9.0.1 Microsoft.NetCore.App.Runtime.linux-musl-x64 | >= 9.0.0, < 9.0.1 | 9.0.1 Microsoft.NetCore.App.Runtime.linux-x64 | >= 9.0.0, < 9.0.1 | 9.0.1 Microsoft.NetCore.App.Runtime.osx-arm64 | >= 9.0.0, < 9.0.1 | 9.0.1 Microsoft.NetCore.App.Runtime.osx-x64 | >= 9.0.0, < 9.0.1 | 9.0.1 Microsoft.NetCore.App.Runtime.win-arm | >= 9.0.0, < 9.0.1 | 9.0.1 Microsoft.NetCore.App.Runtime.win-arm64 | >= 9.0.0, < 9.0.1 | 9.0.1 Microsoft.NetCore.App.Runtime.win-x64 | >= 9.0.0, < 9.0.1 | 9.0.1 Microsoft.NetCore.App.Runtime.win-x86 | >= 9.0.0, < 9.0.1 | 9.0.1

<a name=".NET 8"></a>.NET 8

Package name | Affected version | Patched version ------------ | ---------------- | ------------------------- Microsoft.NetCore.App.Runtime.linux-arm | >= 8.0.0, < 8.0.12 | 8.0.12 Microsoft.NetCore.App.Runtime.linux-arm64 | >= 8.0.0, < 8.0.12 | 8.0.12 Microsoft.NetCore.App.Runtime.linux-musl-arm | >= 8.0.0, < 8.0.12 | 8.0.12 Microsoft.NetCore.App.Runtime.linux-musl-arm64 | >= 8.0.0, < 8.0.12 | 8.0.12…

.NET and Visual Studio Remote Code Execution Vulnerability

.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.

New versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 8.0.112 and .NET Runtime 8.0.1.12.

Security Fix(es):

• dotnet: .NET and Visual Studio Remote Code Execution Vulnerability (CVE-2025-21172)
• dotnet: .NET Elevation of Privilege Vulnerability (CVE-2025-21173)
• dotnet: .NET, .NET Framework, and Visual Studio Remote Code Execution Vulnerability (CVE-2025-21176)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.Security Fix(es):

• dotnet: .NET Elevation of Privilege Vulnerability (CVE-2025-21173)
• dotnet: .NET, .NET Framework, and Visual Studio Remote Code Execution Vulnerability (CVE-2025-21176)
• dotnet: .NET and Visual Studio Remote Code Execution Vulnerability (CVE-2025-21172)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.

New versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 9.0.102 and .NET Runtime 9.0.1.

Security Fix(es):

• dotnet: .NET Remote Code Execution Vulnerability (CVE-2025-21171)
• dotnet: .NET and Visual Studio Remote Code Execution Vulnerability (CVE-2025-21172)
• dotnet: .NET Elevation of Privilege Vulnerability (CVE-2025-21173)
• dotnet: .NET, .NET Framework, and Visual Studio Remote Code Execution Vulnerability (CVE-2025-21176)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.Security Fix(es):

• dotnet: .NET Elevation of Privilege Vulnerability (CVE-2025-21173)
• dotnet: .NET, .NET Framework, and Visual Studio Remote Code Execution Vulnerability (CVE-2025-21176)
• dotnet: .NET and Visual Studio Remote Code Execution Vulnerability (CVE-2025-21172)
• dotnet: .NET Remote Code Execution Vulnerability (CVE-2025-21171)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

.NET and Visual Studio Remote Code Execution Vulnerability

.NET and Visual Studio Remote Code Execution Vulnerability

.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.

New versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 8.0.112 and .NET Runtime 8.0.1.12.

Security Fix(es):

• dotnet: .NET and Visual Studio Remote Code Execution Vulnerability (CVE-2025-21172)
• dotnet: .NET Elevation of Privilege Vulnerability (CVE-2025-21173)
• dotnet: .NET, .NET Framework, and Visual Studio Remote Code Execution Vulnerability (CVE-2025-21176)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.Security Fix(es):

• dotnet: .NET Elevation of Privilege Vulnerability (CVE-2025-21173)

• dotnet: .NET, .NET Framework, and Visual Studio Remote Code Execution Vulnerability (CVE-2025-21176)

• dotnet: .NET and Visual Studio Remote Code Execution Vulnerability (CVE-2025-21172)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.

New versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 9.0.102 and .NET Runtime 9.0.1.

Security Fix(es):

• dotnet: .NET Remote Code Execution Vulnerability (CVE-2025-21171)
• dotnet: .NET and Visual Studio Remote Code Execution Vulnerability (CVE-2025-21172)
• dotnet: .NET Elevation of Privilege Vulnerability (CVE-2025-21173)
• dotnet: .NET, .NET Framework, and Visual Studio Remote Code Execution Vulnerability (CVE-2025-21176)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.Security Fix(es):

• dotnet: .NET Elevation of Privilege Vulnerability (CVE-2025-21173)

• dotnet: .NET, .NET Framework, and Visual Studio Remote Code Execution Vulnerability (CVE-2025-21176)

• dotnet: .NET and Visual Studio Remote Code Execution Vulnerability (CVE-2025-21172)

• dotnet: .NET Remote Code Execution Vulnerability (CVE-2025-21171)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

It was discovered that .NET did not properly handle input provided to its Convert.TryToHexString method. An attacker could possibly use this issue to execute arbitrary code. (CVE-2025-21171)

It was discovered that .NET did not properly handle an integer overflow when processing certain specially crafted files. An attacker could possibly use this issue to execute arbitrary code. (CVE-2025-21172)

Daniel Plaisted and Noah Gilson discovered that .NET insecurely handled temporary file usage which could result in malicious package dependency injection. An attacker could possibly use this issue to elevate privileges. (CVE-2025-21173)

It was discovered that .NET did not properly perform input data validation when processing certain specially crafted files. An attacker could possibly use this issue to execute arbitrary code. (CVE-2025-21176)