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Microsoft Security Response CenterCVE-2026-114157

ASP.NET Core Security Feature Bypass Vulnerability

HighVendor CVSS 7.5 / 10 1 CVE Published Nov 10, 2026 at 8:00 AM UTC
Get alerts for NET 8.0 installed on Windows

Summary

Concurrent execution using shared resource with improper synchronization ('race condition') in ASP.NET Core allows an authorized attacker to elevate privileges locally.

Products covered

  • .NET 8.0 installed on Windows

  • .NET 9.0 installed on Windows

  • .NET 10.0 installed on Windows

  • .NET 11.0 installed on Windows

  • Microsoft Visual Studio 2022 version 17.14

  • Microsoft Visual Studio 2026 version 18.11

  • Microsoft Visual Studio 2026 version 18.12

Remediation

Release Notes Install KB5135243. Install KB5135242. Install KB5135241.

Vendor-listed fixes

  • 8.0.34

  • 9.0.23

  • 10.0.15

  • 11.0.0

  • 17.14.45

  • 18.11.4

  • 18.12.0

CVEs in this advisory 1

CVE-2026-114157

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.

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