CVE-2026-85790
Medium
Description
Use after free in Microsoft QUIC allows an unauthorized attacker to disclose information over a network.
SeverityMedium
CVSS5.9
Exploit probability—
Product
Microsoft Windows
PublishedOct 13, 2026
First seenOct 13, 2026
Weakness typeCWE-416Use after free
How to fix
Update
- microsoft windows_11_23h210.0.22631.7652 or later
- microsoft windows_11_24h210.0.26100.9711 or later
- microsoft windows_11_25h210.0.26200.9711 or later
- microsoft windows_11_26h110.0.28000.3231 or later
- microsoft windows_11_26h210.0.26300.9711 or later
- microsoft windows_server_202210.0.20348.5761 or later
- microsoft windows_server_202510.0.26100.33650 or later
- microsoft native.quic.msquic.schannel2.6.2 or later
- microsoft visual_studio_202217.14.42 or later
- microsoft visual_studio_202618.10.4 or later
- Microsoft.Native.Quic.MsQuic.Schannel2.5.12, 2.6.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft windows_11_23h2 | v < 10.0.22631.7652 | 10.0.22631.7652 |
| microsoft windows_11_24h2 | v < 10.0.26100.9711 | 10.0.26100.9711 |
| microsoft windows_11_25h2 | v < 10.0.26200.9711 | 10.0.26200.9711 |
| microsoft windows_11_26h1 | v < 10.0.28000.3231 | 10.0.28000.3231 |
| microsoft windows_11_26h2 | v < 10.0.26300.9711 | 10.0.26300.9711 |
| microsoft windows_server_2022 | v < 10.0.20348.5761 | 10.0.20348.5761 |
| microsoft windows_server_2025 | v < 10.0.26100.33650 | 10.0.26100.33650 |
| microsoft native.quic.msquic.schannel | v < 2.6.2 | 2.6.2 |
| microsoft visual_studio_2022 | 17.14.0 ≤ v < 17.14.42 | 17.14.42 |
| microsoft visual_studio_2026 | 18.10.0 ≤ v < 18.10.4 | 18.10.4 |
| Microsoft.Native.Quic.MsQuic.SchannelNuGet | 1.9.0 ≤ v < 2.5.12, 2.6.0 ≤ v < 2.6.3 | 2.5.12, 2.6.3 |
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