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Microsoft Security Response CenterCVE-2026-70194

.NET Framework Security Feature Bypass Vulnerability

HighVendor CVSS 6.5 / 10 1 CVE Published Oct 13, 2026 at 7:00 AM UTC

Summary

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

Products covered

  • Microsoft Visual Studio 2026 version 18.10

  • Microsoft Visual Studio 2022 version 17.14

  • .NET 11.0 installed on Linux

  • .NET 11.0 installed on Mac OS

Remediation

Release Notes

Vendor-listed fixes

  • 18.10.4

  • 17.14.42

  • 11.0.0-rc.2

CVEs in this advisory 1

Updates

  1. Published by Microsoft Security Response Center

    The publication date reported by the vendor.

  2. Added to SecurityAlert

    We collected the advisory from the official source.

  3. Confirmed at the source

    Our collector saw this advisory during a later source check.