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Advisory severityCritical9.8Microsoft Server

Critical [CVE-2026-105016] Microsoft QUIC Remote Code Execution Vulnerability

This critical-severity Microsoft Server advisory covers CVE-2026-105016 affecting Windows Server 2022, Windows Server 2025.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-105016 Source published Source updated

VulniPulse record published Record updated

CVE-2026-105016
Affected products & platforms
Microsoft ServerWindows Server
Open source advisory

Summary

Microsoft QUIC Remote Code Execution Vulnerability

Affected products named by the advisory: Windows Server 2022; Windows Server 2025.

Is CVE-2026-105016 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-105016 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.

How do I fix CVE-2026-105016?

Upgrade to a fixed release named by Microsoft:

  • KB5126655 (build 10.0.20348.5761)
  • KB5126653 (build 10.0.22631.7652)
  • KB5127648 (build 10.0.26300.9711)
  • KB5126646 (build 10.0.26100.33650)
  • KB5127646 (build 10.0.28000.3231)
  • KB5130034 (build 8.0.32)
  • KB5130035 (build 9.0.21)

Confirm against the vendor advisory before you patch.

Affected versions
  • .NET 10.0 10.0.0 before 10.0.14
  • .NET 11.0 11.0.0 before 11.0.0-rc.2.26504.105
  • .NET 8.0 8.0.0 before 8.0.32
  • .NET 9.0 9.0.0 before 9.0.21
  • Microsoft Visual Studio 2022 version 17.14 17.14.0 before 17.14.42
  • Microsoft Visual Studio 2026 version 18.10 18.10.0 before 18.10.4
  • Windows 11 version 23H2 10.0.22631.0 before 10.0.22631.7652
  • Windows 11 Version 23H2 10.0.22631.0 before 10.0.22631.7652
  • Windows 11 Version 24H2 10.0.26100.0 before 10.0.26100.9711
  • Windows 11 Version 25H2 10.0.26200.0 before 10.0.26200.9711
  • Windows 11 version 26H1 10.0.28000.0 before 10.0.28000.3231
  • Windows 11 Version 26H2 10.0.26300.0 before 10.0.26300.9711

Official advisory · high-confidence parse· fetched 24 days ago·verify at source

Fixed versions
  • KB5126655 (build 10.0.20348.5761)
  • KB5126653 (build 10.0.22631.7652)
  • KB5127648 (build 10.0.26300.9711)
  • KB5126646 (build 10.0.26100.33650)
  • KB5127646 (build 10.0.28000.3231)
  • KB5130034 (build 8.0.32)
  • KB5130035 (build 9.0.21)

Official advisory · high-confidence parse· fetched 24 days ago·verify at source

Mitigation checklist

Recommended fix / mitigation
  • Install the applicable security update for your platform: KB5126655, KB5126653, KB5127648, KB5126646, KB5127646, KB5130034 (see the Microsoft Update Catalog).

Official advisory · high-confidence parse· fetched 24 days ago·verify at source

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