CVE-2026-85790

Microsoft QUIC Information Disclosure Vulnerability

Published Oct 13, 2026 CVSS 3.1 · 5.9 Medium EPSS < 1% KEV · Not listed
Description
Use after free in Microsoft QUIC allows an unauthorized attacker to disclose information over a network.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-2mxg-prvg-9jfg Microsoft Security Advisory CVE-2026-85790 - .NET Information Disclosure Vulnerability
History
Type Values Removed Values Added
First Time appeared Microsoft microsoft Visual Studio 2026
Microsoft windows Server 2025 (server Core Installation)
Vendors & Products Microsoft microsoft Visual Studio 2026
Microsoft windows Server 2025 (server Core Installation)
Type Values Removed Values Added
First Time appeared Microsoft .net
Microsoft native.quic.msquic.schannel
Microsoft visual Studio 2026
Microsoft windows 11 23h2
Microsoft windows 11 24h2
Microsoft windows 11 25h2
Microsoft windows 11 26h1
Microsoft windows 11 26h2
CPEs cpe:2.3:a:microsoft:.net:10.0.0:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:.net:11.0.0:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:.net:8.0.0:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:.net:9.0.0:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:native.quic.msquic.schannel:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:visual_studio_2026:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_11_26h2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_26h2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:x64:*
Vendors & Products Microsoft .net
Microsoft native.quic.msquic.schannel
Microsoft visual Studio 2026
Microsoft windows 11 23h2
Microsoft windows 11 24h2
Microsoft windows 11 25h2
Microsoft windows 11 26h1
Microsoft windows 11 26h2
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Use after free in Microsoft QUIC allows an unauthorized attacker to disclose information over a network.
Title Microsoft QUIC Information Disclosure Vulnerability
First Time appeared Microsoft
Microsoft microsoft.native.quic.msquic.schannel
Microsoft microsoft Visual Studio 2026 Version 18.10
Microsoft visual Studio 2022
Microsoft windows 11 23h2
Microsoft windows 11 24h2
Microsoft windows 11 25h2
Microsoft windows 11 26h1
Microsoft windows 11 Version 26h2 For Arm64-based Systems
Microsoft windows Server 2022
Microsoft windows Server 2025
Weaknesses CWE-416
CPEs cpe:2.3:a:microsoft:microsoft.native.quic.msquic.schannel:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:microsoft_visual_studio_2026_version_18.10:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:windows_11_version_26h2_for_arm64-based_systems:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_11_24H2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_25H2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_26H1:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft microsoft.native.quic.msquic.schannel
Microsoft microsoft Visual Studio 2026 Version 18.10
Microsoft visual Studio 2022
Microsoft windows 11 23h2
Microsoft windows 11 24h2
Microsoft windows 11 25h2
Microsoft windows 11 26h1
Microsoft windows 11 Version 26h2 For Arm64-based Systems
Microsoft windows Server 2022
Microsoft windows Server 2025
References
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C'}