Microsoft Security Advisory CVE-2026-105016 - Microsoft QUIC Remote Code Execution Vulnerability

[ Why it matters ]Priority signals

• Critical severity: CVSS 9.8

[ Description ]Official description

Heap-based buffer overflow in Microsoft QUIC allows an unauthorized attacker to execute code over a network.

[ Fixes ]Fixes and patches

• Microsoft.Native.Quic.MsQuic.Schannel 2.5.11-ci.159417053Fixed version · GitHub Advisories · nuget package Microsoft.Native.Quic.MsQuic.Schannel: upgrade to 2.5.11-ci.159417053 or later (affected = 2.5.11-ci.156755675)

[ Advisories ]Government CERT advisories

• CERT-FR14 Oct 2026CERTFR-2026-AVI-1313

  Multiple vulnerabilities in Microsoft .Net Translated from French

  Multiple vulnerabilities have been discovered in Microsoft .Net. Some of them allow an attacker to cause remote arbitrary code execution, privilege escalation and remote denial of service.

  CVE-2026-70007CVE-2026-105016CVE-2026-96234+40 more CVEs
• CERT-FR14 Oct 2026CERTFR-2026-AVI-1316

  Multiple vulnerabilities in Microsoft products Translated from French

  Multiple vulnerabilities have been discovered in Microsoft products. Some of them allow an attacker to cause remote arbitrary code execution, privilege escalation and remote denial of service.

  CVE-2026-88086CVE-2026-70007CVE-2026-70179+141 more CVEs
• CERT-FR14 Oct 2026CERTFR-2026-AVI-1314

  Multiple vulnerabilities in Microsoft Windows Translated from French

  Multiple vulnerabilities have been discovered in Microsoft Windows. Some of them allow an attacker to cause remote arbitrary code execution, privilege escalation and remote denial of service. Microsoft reports that…

  CVE-2026-70096CVE-2026-100200CVE-2026-100201+1118 more CVEs
• BSI CERT-Bund13 Oct 2026WID-SEC-2026-3893

  Microsoft Entwicklerwerkzeuge: Multiple vulnerabilities Translated from German

  Risk highCVE-2026-96230CVE-2026-84008CVE-2026-102238+64 more CVEs
• BSI CERT-Bund13 Oct 2026WID-SEC-2026-3892

  Microsoft Windows and Windows Server: Multiple vulnerabilities Translated from German

  CVE-2026-69968CVE-2026-83785CVE-2026-72968+1124 more CVEs
• NCSC-NL13 Oct 2026NCSC-2026-0423

  Vulnerabilities fixed in Microsoft Windows Translated from Dutch

  Probability/damage M/HCVE-2026-100202CVE-2026-100219CVE-2026-100222+49 more CVEs

[ Packages ]Affected open-source packages

• Microsoft.Native.Quic.MsQuic.Schannel nugetAffected = 2.5.11-ci.156755675 · fixed in 2.5.11-ci.159417053 · GHSA-5gjq-3f94-rcf7

[ References ]References

• msrc.microsoft.com/update-guide/vulnerability/CVE-2026-105016