Microsoft QUIC Remote Code Execution Vulnerability

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-105016
StatePUBLISHED
Assignermicrosoft
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-13 19:17:57 UTC
Updated2026-10-22 22:17:52 UTC
DescriptionHeap-based buffer overflow in Microsoft QUIC allows an unauthorized attacker to execute code over a network.

Risk And Classification

Primary CVSS: v3.1 9.8 CRITICAL from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.009860000 probability, percentile 0.620380000 (date 2026-10-22)

Problem Types: CWE-122 | CWE-122 CWE-122: Heap-based Buffer Overflow

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNACVSS9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Microsoft .NET 10.0 Runtime affected 10.0.0 10.0.14 custom Not specified
CNA Microsoft .NET 11.0 Runtime affected 11.0.0 11.0.0-rc.2.26504.105 custom Not specified
CNA Microsoft .NET 8.0 Runtime affected 8.0.0 8.0.32 custom Not specified
CNA Microsoft .NET 9.0 Runtime affected 9.0.0 9.0.21 custom Not specified
CNA Microsoft Microsoft Visual Studio 2022 Version 17.14 affected 17.14.0 17.14.42 custom Not specified
CNA Microsoft Microsoft Visual Studio 2026 Version 18.10 affected 18.10.0 18.10.4 custom Not specified
CNA Microsoft Windows 11 Version 23H2 affected 10.0.22631.0 10.0.22631.7652 custom ARM64-based Systems
CNA Microsoft Windows 11 Version 23H2 affected 10.0.22631.0 10.0.22631.7652 custom x64-based Systems
CNA Microsoft Windows 11 Version 24H2 affected 10.0.26100.0 10.0.26100.9711 custom ARM64-based Systems, x64-based Systems
CNA Microsoft Windows 11 Version 25H2 affected 10.0.26200.0 10.0.26200.9711 custom ARM64-based Systems, x64-based Systems
CNA Microsoft Windows 11 Version 26H1 affected 10.0.28000.0 10.0.28000.3231 custom ARM64-based Systems, x64-based Systems
CNA Microsoft Windows 11 Version 26H2 affected 10.0.26300.0 10.0.26300.9711 custom ARM64-based Systems, x64-based Systems
CNA Microsoft Windows Server 2022 affected 10.0.20348.0 10.0.20348.5761 custom x64-based Systems
CNA Microsoft Windows Server 2025 affected 10.0.26100.0 10.0.26100.33650 custom x64-based Systems
CNA Microsoft Windows Server 2025 Server Core Installation affected 10.0.26100.0 10.0.26100.33650 custom x64-based Systems

References

ReferenceSourceLinkTags
msrc.microsoft.com/update-guide/vulnerability/CVE-2026-105016 [email protected] msrc.microsoft.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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