CVE-2026-85790HighCVSS 5.9

Microsoft QUIC Information Disclosure Vulnerability

Published
October 13, 2026
Last Modified
—

🔗 CVE IDs covered (1)

CVE-2026-85790 →

📋 Description

Use after free in Microsoft QUIC allows an unauthorized attacker to disclose information over a network.

🎯 Affected products20

  • Microsoft Visual Studio 2022 version 17.14
  • Microsoft Visual Studio 2026 version 18.10
  • Microsoft.Native.Quic.MsQuic.Schannel on .NET 10.0 installed on Windows
  • Microsoft.Native.Quic.MsQuic.Schannel on .NET 11.0 installed on Windows
  • Microsoft.Native.Quic.MsQuic.Schannel on .NET 8.0 installed on Windows
  • Microsoft.Native.Quic.MsQuic.Schannel on .NET 9.0 installed on Windows
  • Windows 11 Version 23H2 for ARM64-based Systems
  • Windows 11 Version 23H2 for x64-based Systems
  • Windows 11 Version 24H2 for ARM64-based Systems
  • Windows 11 Version 24H2 for x64-based Systems
  • Windows 11 Version 25H2 for ARM64-based Systems
  • Windows 11 Version 25H2 for x64-based Systems
  • Windows 11 Version 26H1 for ARM64-based Systems
  • Windows 11 Version 26H2 for ARM64-based Systems
  • Windows 11 Version 26H2 for x64-based Systems
  • Windows 11 version 26H1 for x64-based Systems
  • Windows Server 2022
  • Windows Server 2022 (Server Core installation)
  • Windows Server 2025
  • Windows Server 2025 (Server Core installation)

✅ Remediation

KB5127648 (Security Update) — fixed build 10.0.26300.9711 KBRelease Notes (Security Update) — fixed build 18.10.4 KBRelease Notes (Security Update) — fixed build 17.14.42 KBRelease Notes (Security Update) — fixed build 2.6.2 KB5126655 (Security Update) — fixed build 10.0.20348.5761 KB5126646 (Security Update) — fixed build 10.0.26100.33650 KB5127648 (Security Update) — fixed build 10.0.26200.9711 KB5126653 (Security Update) — fixed build 10.0.22631.7652 KB5127648 (Security Update) — fixed build 10.0.26100.9711 KB5127646 (Security Update) — fixed build 10.0.28000.3231

🔗 References (12)