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[ CVE-2026-70194 · Published 13 Oct 2026 ]

Microsoft Security Advisory CVE-2026-70194 - .NET and Visual Studio Security Feature Bypass Vulnerability

CVSS 6.5 EPSS <1%4 agency advisoriesFix available

[ Description ]Official description

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

[ Fixes ]Fixes and patches

[ Advisories ]Government CERT advisories

  • CERT-FRCERTFR-2026-AVI-1313

    Multiple vulnerabilities in Microsoft .Net Translated from French

    Multiple vulnerabilities have been discovered in Microsoft .Net. Some of them allow an attacker to cause remote arbitrary code execution, privilege escalation and remote denial of service.

    CVE-2026-70007CVE-2026-105016CVE-2026-96234+40 more CVEs
  • CERT-FRCERTFR-2026-AVI-1316

    Multiple vulnerabilities in Microsoft products Translated from French

    Multiple vulnerabilities have been discovered in Microsoft products. Some of them allow an attacker to cause remote arbitrary code execution, privilege escalation and remote denial of service.

    CVE-2026-88086CVE-2026-70007CVE-2026-70179+141 more CVEs
  • BSI CERT-BundWID-SEC-2026-3893

    Microsoft Entwicklerwerkzeuge: Multiple vulnerabilities Translated from German

    Risk highCVE-2026-96230CVE-2026-84008CVE-2026-102238+64 more CVEs
  • NCSC-NLNCSC-2026-0426

    Vulnerabilities fixed in Microsoft Developer Tools Translated from Dutch

    Probability/damage M/HCVE-2026-58280CVE-2026-66822CVE-2026-69370+59 more CVEs

[ Packages ]Affected open-source packages

  • Microsoft.NETCore.App.Runtime.linux-arm nugetAffected >= 11.0.0-preview.1, <= 11.0.0-rc.1 · fixed in 11.0.0-rc.2 · GHSA-fqpq-cx42-9jmm
  • Microsoft.NETCore.App.Runtime.linux-arm64 nugetAffected >= 11.0.0-preview.1, <= 11.0.0-rc.1 · fixed in 11.0.0-rc.2 · GHSA-fqpq-cx42-9jmm
  • Microsoft.NETCore.App.Runtime.linux-musl-arm nugetAffected >= 11.0.0-preview.1, <= 11.0.0-rc.1 · fixed in 11.0.0-rc.2 · GHSA-fqpq-cx42-9jmm
  • Microsoft.NETCore.App.Runtime.linux-musl-arm64 nugetAffected >= 11.0.0-preview.1, <= 11.0.0-rc.1 · fixed in 11.0.0-rc.2 · GHSA-fqpq-cx42-9jmm
  • Microsoft.NETCore.App.Runtime.linux-musl-x64 nugetAffected >= 11.0.0-preview.1, <= 11.0.0-rc.1 · fixed in 11.0.0-rc.2 · GHSA-fqpq-cx42-9jmm
  • Microsoft.NETCore.App.Runtime.linux-x64 nugetAffected >= 11.0.0-preview.1, <= 11.0.0-rc.1 · fixed in 11.0.0-rc.2 · GHSA-fqpq-cx42-9jmm
  • Microsoft.NETCore.App.Runtime.osx-arm64 nugetAffected >= 11.0.0-preview.1, <= 11.0.0-rc.1 · fixed in 11.0.0-rc.2 · GHSA-fqpq-cx42-9jmm
  • Microsoft.NETCore.App.Runtime.osx-x64 nugetAffected >= 11.0.0-preview.1, <= 11.0.0-rc.1 · fixed in 11.0.0-rc.2 · GHSA-fqpq-cx42-9jmm

[ References ]References