CVE-2026-85790
Microsoft QUIC Information Disclosure Vulnerability
No known exploitation. No EPSS score yet. Fixed versions are out.
What to do
Find your product and version, then upgrade to the build on the right.
- Microsoft Visual Studio 2022 version 17.14Affected: ≥ 17.14.0, < 17.14.42Upgrade to: 17.14.42Stated by: CVE record
- Microsoft Visual Studio 2026 version 18.10Affected: ≥ 18.10.0, < 18.10.4Upgrade to: 18.10.4Stated by: CVE record
- Microsoft.Native.Quic.MsQuic.SchannelAffected: ≥ 1.9.0, < 2.6.2Upgrade to: 2.6.2Stated by: CVE record
- Microsoft Windows 11 version 23H2Affected: ≥ 10.0.22631.0, < 10.0.22631.7652Upgrade to: 10.0.22631.7652Affected: ≥ 10.0.26100.0, < 10.0.26100.9711Upgrade to: 10.0.26100.9711Affected: ≥ 10.0.26200.0, < 10.0.26200.9711Upgrade to: 10.0.26200.9711Affected: ≥ 10.0.28000.0, < 10.0.28000.3231Upgrade to: 10.0.28000.3231Stated by: CVE record
- Microsoft Windows 11 Version 26H2Affected: ≥ 10.0.26300.0, < 10.0.26300.9711Upgrade to: 10.0.26300.9711Stated by: CVE record
Versions as the sources state them. 2 more products have version data. Full version matrix after sign-in
What it is
From the CVE record
Use after free in Microsoft QUIC allows an unauthorized attacker to disclose information over a network.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
No EPSS score yet. New CVEs are usually scored within a few days.
Lifecycle
5 events over 0 days, from the signal feeds we watch.
- Publishedweakness classified, att&ck mapped, record updated, record updated
Affected products
- Microsoft Visual Studio 2022 version 17.14DevTools & CI / ide-editor
- Microsoft Visual Studio 2026 version 18.10Operating Systems / windows
- Microsoft.Native.Quic.MsQuic.SchannelOperating Systems / windows
- Windows 11 version 23H2Operating Systems / windows
- Windows 11 Version 26H2Operating Systems / windows
- Windows Server 2022Operating Systems / windows
- Windows Server 2025 (Server Core installation)Operating Systems / windows
And 5 more affected products. See all after sign-in
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Scored 5.9 by NVD.
How it is reached
- Attack Vector NetworkExploitable remotely over the network without any special conditions
- Attack Complexity HighRequires specific conditions like a race condition or non-default configuration
- Privileges Required NoneNo authentication required — anyone can exploit this
- User Interaction NoneNo user interaction needed — fully automated exploitation
Scope
- Scope UnchangedImpact is limited to the vulnerable component itself
Impact if exploited
- Confidentiality HighTotal information disclosure — all data in the component is compromised
- Integrity NoneNo integrity impact
- Availability NoneNo availability impact
Weaknesses
ATT&CK techniques
Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.
- Initial AccessT1190Exploit Public-Facing Applicationhigh confidence
- Privilege EscalationT1068Exploitation for Privilege Escalationhigh confidence
Sources
Watch the software you run.
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- Exploit links, proofs of concept and Metasploit modules
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