Improper certificate validation in .NET Framework allows an unauthorized attacker to bypass a security feature over a network.

The remote Ubuntu 22.04 LTS / 24.04 LTS / 26.04 LTS / 26.10 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8942-1 advisory.

    Multiple security issues were discovered in .NET and this update includes new upstream .NET versions to     fix these issues.

    .NET 8 has been updated to 8.0.32 in Ubuntu 22.04 LTS and Ubuntu 24.04 LTS. .NET 10 has been updated to     10.0.13 in Ubuntu 24.04 LTS, Ubuntu 26.04 LTS and Ubuntu 26.10. .NET 11 has been updated to 11.0.0~rc2 in     Ubuntu 26.10.

    In addition to security fixes, the updated packages contain bug fixes, new features, and possibly     incompatible changes.

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

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

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Improper certificate validation in .NET Framework allows an unauthorized attacker to bypass a security     feature over a network. (CVE-2026-70194)

Note that Nessus relies on the presence of the package as reported by the vendor.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - Improper certificate validation in .NET Framework allows an unauthorized attacker to bypass a security
    feature over a network. (CVE-2026-70194)

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

  - Heap-based buffer overflow in Microsoft QUIC allows an unauthorized attacker to execute code over     a network. (CVE-2026-105016)

  - Inconsistent interpretation of http requests ('http request/response smuggling') in ASP.NET Core     allows an unauthorized attacker to perform tampering over a network. (CVE-2026-88092)

  - Inconsistent interpretation of http requests ('http request/response smuggling') in ASP.NET Core     allows an unauthorized attacker to bypass a security feature over a network. (CVE-2026-70188)

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	Type	Severity
369510	Ubuntu 22.04 LTS / 24.04 LTS / 26.04 LTS / 26.10 : .NET vulnerabilities (USN-8942-1)	Nessus	Ubuntu Local Security Checks	Local	critical
367598	Linux Distros Unpatched Vulnerability : CVE-2026-70194	Nessus	Misc.	Local	medium
476183	SCA: security update for Microsoft.NETCore.App.Runtime.linux-arm, Microsoft.NETCore.App.Runtime.linux-arm64, Microsoft.NETCore.App.Runtime.linux-musl-arm, Microsoft.NETCore.App.Runtime.linux-musl-arm64, Microsoft.NETCore.App.Runtime.linux-musl-x64, Microsoft.NETCore.App.Runtime.linux-x64, Microsoft.NETCore.App.Runtime.osx-arm64, Microsoft.NETCore.App.Runtime.osx-x64 (GHSA-fqpq-cx42-9jmm)	Tenable Cloud Security	SCA Checks	Local	medium
476183	SCA: security update for Microsoft.NETCore.App.Runtime.linux-arm, Microsoft.NETCore.App.Runtime.linux-arm64, Microsoft.NETCore.App.Runtime.linux-musl-arm, Microsoft.NETCore.App.Runtime.linux-musl-arm64, Microsoft.NETCore.App.Runtime.linux-musl-x64, Microsoft.NETCore.App.Runtime.linux-x64, Microsoft.NETCore.App.Runtime.osx-arm64, Microsoft.NETCore.App.Runtime.osx-x64 (GHSA-fqpq-cx42-9jmm)	Tenable Self-Hosted Container Security	SCA Checks	Local	medium
366085	Security Updates for Microsoft Visual Studio Products 17.14.42 and 18.10.4 (October 2026)	Nessus	Windows : Microsoft Bulletins	Local	critical

Detections

Analytics

CVE-2026-70194

medium

Tenable Plugins

critical

medium

medium

medium

critical