A tampering vulnerability exists when .NET Core improperly handles specially crafted files. An attacker who successfully exploited this vulnerability could write arbitrary files and directories to certain locations on a vulnerable system. However, an attacker would have limited control over the destination of the files and directories. To exploit the vulnerability, an attacker must send a specially crafted file to a vulnerable system. The security update fixes the vulnerability by ensuring .NET Core properly handles files.

The version of tested product installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the vendor advisory.

  - A tampering vulnerability exists when .NET Core improperly handles specially crafted files. An attacker     who successfully exploited this vulnerability could write arbitrary files and directories to certain     locations on a vulnerable system. However, an attacker would have limited control over the destination of     the files and directories. To exploit the vulnerability, an attacker must send a specially crafted file to     a vulnerable system. The security update fixes the vulnerability by ensuring .NET Core properly handles     files. (CVE-2026-32175)

  - Heap-based buffer overflow in .NET allows an unauthorized attacker to elevate privileges locally.
    (CVE-2026-32177)

  - Improper input validation in .NET allows an unauthorized attacker to elevate privileges locally.
    (CVE-2026-35433)

  - Loop with unreachable exit condition ('infinite loop') in ASP.NET Core allows an unauthorized attacker to     deny service over a network. (CVE-2026-42899)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Microsoft Visual Studio Products are missing security updates. It is, therefore, affected by multiple vulnerabilities:

  - Heap-based buffer overflow in .NET allows an unauthorized attacker to elevate privileges locally.   (CVE-2026-32177)

  - A tampering vulnerability exists when .NET Core improperly handles specially crafted files. An attacker   who successfully exploited this vulnerability could write arbitrary files and directories to certain   locations on a vulnerable system. However, an attacker would have limited control over the destination of   the files and directories. To exploit the vulnerability, an attacker must send a specially crafted file to   a vulnerable system. The security update fixes the vulnerability by ensuring .NET Core properly handles   files. (CVE-2026-32175)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
314680	Security Update for Microsoft .NET Core SDK (May 2026)	Nessus	Windows	high
314679	Security Update for Microsoft .NET Core (May 2026)	Nessus	Windows	high
314647	Security Updates for Microsoft Visual Studio Products (May 2026)	Nessus	Windows : Microsoft Bulletins	high

Detections

Analytics

CVE-2026-32175

medium

Tenable Plugins

high

high

high