CVE-2026-85790

Microsoft QUIC Information Disclosure Vulnerability

MEDIUM 5.9

At a glance

Source: NVD
EPSS: EPSS 0.80 % · percentile 57 (2026-10-28)
State: PUBLISHED
Published: 2026-10-13 19:00 UTC
Updated: 2026-10-28 18:13 UTC
Assigner: microsoft
NVD status: Analyzed

Description

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

Weaknesses (CWE)

CWE-416 — Use After Free

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85790

Scores

Version	Score	Vector	Scored by
CVSS 3.1	MEDIUM 5.9	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	microsoft
CVSS 3.1	MEDIUM 5.9	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N	NVD · secure@microsoft.com (Secondary)

Advisories

GHSA-2mxg-prvg-9jfg — Microsoft Security Advisory CVE-2026-85790 - .NET Information Disclosure Vulnerability

European references

ENISA EUVD · EUVD-2026-99502
GCVE · GCVE-0-2026-85790

CERT-FR advisories

CERTFR-2026-AVI-1316 — Multiples vulnérabilités dans les produits Microsoft · cert.ssi.gouv.fr
CERTFR-2026-AVI-1314 — Multiples vulnérabilités dans Microsoft Windows · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:arm64:* < 10.0.22631.7652
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:x64:* < 10.0.22631.7652
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:* < 10.0.26100.9711
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:x64:* < 10.0.26100.9711
cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:arm64:* < 10.0.26200.9711
cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:x64:* < 10.0.26200.9711
cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:arm64:* < 10.0.28000.3231
cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:x64:* < 10.0.28000.3231
cpe:2.3:o:microsoft:windows_11_26h2:*:*:*:*:*:*:arm64:* < 10.0.26300.9711
cpe:2.3:o:microsoft:windows_11_26h2:*:*:*:*:*:*:x64:* < 10.0.26300.9711
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:x64:* < 10.0.20348.5761
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:x64:* < 10.0.26100.33650
cpe:2.3:a:microsoft:native.quic.msquic.schannel:*:*:*:*:*:*:*:* < 2.6.2
cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:* ≥ 17.14.0 < 17.14.42
cpe:2.3:a:microsoft:visual_studio_2026:*:*:*:*:*:*:*:* ≥ 18.10.0 < 18.10.4

Affected products

Product	Versions
Microsoft · Microsoft Visual Studio 2022 version 17.14	affected 17.14.0 < 17.14.42
Microsoft · Microsoft Visual Studio 2026 version 18.10	affected 18.10.0 < 18.10.4
Microsoft · Microsoft.Native.Quic.MsQuic.Schannel	affected 1.9.0 < 2.6.2
Microsoft · Windows 11 version 23H2	affected 10.0.22631.0 < 10.0.22631.7652
Microsoft · Windows 11 Version 23H2	affected 10.0.22631.0 < 10.0.22631.7652
Microsoft · Windows 11 Version 24H2	affected 10.0.26100.0 < 10.0.26100.9711
Microsoft · Windows 11 Version 25H2	affected 10.0.26200.0 < 10.0.26200.9711
Microsoft · Windows 11 version 26H1	affected 10.0.28000.0 < 10.0.28000.3231
Microsoft · Windows 11 Version 26H2	affected 10.0.26300.0 < 10.0.26300.9711
Microsoft · Windows Server 2022	affected 10.0.20348.0 < 10.0.20348.5761
Microsoft · Windows Server 2025	affected 10.0.26100.0 < 10.0.26100.33650
Microsoft · Windows Server 2025 (Server Core installation)	affected 10.0.26100.0 < 10.0.26100.33650

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD