CVE-2026-70179HighCVSS 7.5

ASP.NET Core Elevation of Privilege Vulnerability

Published
October 13, 2026
Last Modified
—

🔗 CVE IDs covered (1)

CVE-2026-70179 →

📋 Description

Authentication bypass by spoofing in ASP.NET Core allows an authorized attacker to elevate privileges over a network.

🎯 Affected products11

  • Microsoft Visual Studio 2022 version 17.14
  • Microsoft Visual Studio 2026 version 18.10
  • Microsoft.AspNetCore.Authentication.Negotiate on .NET 10.0 installed on Linux
  • Microsoft.AspNetCore.Authentication.Negotiate on .NET 10.0 installed on Mac OS
  • Microsoft.AspNetCore.Authentication.Negotiate on .NET 10.0 installed on Windows
  • Microsoft.AspNetCore.Authentication.Negotiate on .NET 8.0 installed on Linux
  • Microsoft.AspNetCore.Authentication.Negotiate on .NET 8.0 installed on Mac OS
  • Microsoft.AspNetCore.Authentication.Negotiate on .NET 8.0 installed on Windows
  • Microsoft.AspNetCore.Authentication.Negotiate on .NET 9.0 installed on Linux
  • Microsoft.AspNetCore.Authentication.Negotiate on .NET 9.0 installed on Mac OS
  • Microsoft.AspNetCore.Authentication.Negotiate on .NET 9.0 installed on Windows

✅ Remediation

KBRelease Notes (Security Update) — fixed build 18.10.4 KBRelease Notes (Security Update) — fixed build 17.14.42 KBRelease Notes (Security Update) — fixed build 10.0.13 KBRelease Notes (Security Update) — fixed build 8.0.32 KBRelease Notes (Security Update) — fixed build 9.0.21

🔗 References (2)