CVE-2026-85790

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

CVSS 3.1

5.9CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS

0.8% chance of exploitation in the next 30 days; higher than 56% of CVEs (scores of 2026-10-25)

CWE

CWE-416

Published

2026-10-13

Modified

2026-10-22

Record from

the NVD, synced 2026-10-23

Affected

• microsoft:native.quic.msquic.schannel
• microsoft:visual_studio_2022
• microsoft:visual_studio_2026
• microsoft:windows_11_23h2
• microsoft:windows_11_24h2
• microsoft:windows_11_25h2
• microsoft:windows_11_26h1
• microsoft:windows_11_26h2
• microsoft:windows_server_2022
• microsoft:windows_server_2025

References

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

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