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Recorded 16 Oct 2026 at 16:13 UTC. This is what ChangeIntel recorded, including the title, summary, facts and links. It is not a statement of the source's current position. See the latest record.

Microsoft QUIC Information Disclosure Vulnerability

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

Cite this recorded revision

What it said

CVE
CVE-2026-85790
Severity
Important
CVSS base score
5.9
CVSS 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
Impact
Information Disclosure
Exploitation detected
Not reported by MSRC
Publicly disclosed
No
Exploitability
Exploitation Less Likely
Component
Microsoft QUIC
Weakness
CWE-416: Use After Free
Issued by
Microsoft
Customer action
Required: apply the update
Affected products
Microsoft Visual Studio 2022 version 17.14, Microsoft Visual Studio 2026 version 18.10, Microsoft.Native.Quic.MsQuic.Schannel on .NET 10.0 installed on Windows, Microsoft.Native.Quic.MsQuic.Schannel on .NET 11.0 installed on Windows, Microsoft.Native.Quic.MsQuic.Schannel on .NET 8.0 installed on Windows, Microsoft.Native.Quic.MsQuic.Schannel on .NET 9.0 installed on Windows, Windows 11 Version 23H2 for ARM64-based Systems, Windows 11 Version 23H2 for x64-based Systems, Windows 11 Version 24H2 for ARM64-based Systems, Windows 11 Version 24H2 for x64-based Systems, Windows 11 Version 25H2 for ARM64-based Systems, Windows 11 Version 25H2 for x64-based Systems, Windows 11 Version 26H1 for ARM64-based Systems, Windows 11 version 26H1 for x64-based Systems, Windows 11 Version 26H2 for ARM64-based Systems, Windows 11 Version 26H2 for x64-based Systems, Windows Server 2022, Windows Server 2022 (Server Core installation), Windows Server 2025, Windows Server 2025 (Server Core installation)
Updates that fix it
KB5126646: Windows Server 2025, Windows Server 2025 (Server Core installation) (restart required); KB5126653: Windows 11 Version 23H2 for ARM64-based Systems, Windows 11 Version 23H2 for x64-based Systems (restart required); KB5126655: Windows Server 2022, Windows Server 2022 (Server Core installation) (restart required); KB5127646: Windows 11 Version 26H1 for ARM64-based Systems, Windows 11 version 26H1 for x64-based Systems (restart required); KB5127648: Windows 11 Version 24H2 for ARM64-based Systems, Windows 11 Version 24H2 for x64-based Systems, Windows 11 Version 25H2 for ARM64-based Systems, Windows 11 Version 25H2 for x64-based Systems, Windows 11 Version 26H2 for ARM64-based Systems, Windows 11 Version 26H2 for x64-based Systems (restart required)
CISA KEV
Not listed in the collected catalog
EPSS
0.7%; scored 16 Oct 2026
Public exploit code
No Nuclei template listed
Published
13 Oct 2026 07:00 UTC
Last revised
15 Oct 2026 07:00 UTC
Revision note
Updated the Security Updates table to add KB article links for .NET 11.0. This is an informational change only; the fixed builds are unchanged.

Source evidence when recorded

Microsoft security releases
Complete at observationRead 16 Oct 2026 at 16:12 UTC
CISA KEV
Complete at observationRead 16 Oct 2026 at 16:12 UTC
FIRST EPSS
Complete at observationRead 16 Oct 2026 at 16:12 UTC
Public exploit code
Complete at observationRead 16 Oct 2026 at 16:12 UTC

Coverage describes the sources at this observation. A complete read then does not establish their current position.

What changed

First observed 14 Oct 2026
  1. 16 Oct 2026 · 16:13:25 UTC EPSS0.7%; scored 15 Oct 2026 → 0.7%; scored 16 Oct 2026
  2. 15 Oct 2026 · 21:30:54 UTC Revision noteInformation published. → Updated the Security Updates table to add KB article links for .NET 11.0. This is an informational change only; the fixed builds are unchanged.
  3. 15 Oct 2026 · 21:30:54 UTC Last revised13 Oct 2026 07:00 UTC → 15 Oct 2026 07:00 UTC
  4. 15 Oct 2026 · 21:30:54 UTC EPSS0.7%; scored 14 Oct 2026 → 0.7%; scored 15 Oct 2026
  5. 15 Oct 2026 · 01:07:54 UTC EPSSNot scored → 0.7%; scored 14 Oct 2026

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ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 25 Oct 20:05 UTC · 271 of 271 readable · 269 fully read · documentation 464/464 current