CVE-2026-62815Critical· 9.8▾ MidnightUse after free in Microsoft QUIC allows an unauthorized attacker to execute code over a network.
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 53.9 · likelihood 0.2 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Sep 8.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
1.0%
1.0% → 1.2%
Last analysed / modified upstream
Use after free in Microsoft QUIC allows an unauthorized attacker to execute code over a network.
windows_11_version_23h2 >= 10.0.22631.0 < 10.0.22631.7517windows_11_version_23h2 >= 10.0.22631.0 < 10.0.22631.7517windows_11_version_24h2 >= 10.0.26100.0 < 10.0.26100.9168windows_11_version_25h2 >= 10.0.26200.0 < 10.0.26200.9168windows_11_version_26h1 >= 10.0.28000.0 < 10.0.28000.2704windows_server_2022 >= 10.0.20348.0 < 10.0.20348.5499windows_server_2025 >= 10.0.26100.0 < 10.0.26100.33296windows_server_2025_server_core_installation >= 10.0.26100.0 < 10.0.26100.33296Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Affected packages:
Microsoft.Native.Quic.MsQuic.OpenSSL >= 2.5.3, < 2.5.10Microsoft.Native.Quic.MsQuic.Schannel >= 2.5.3, < 2.5.10Microsoft.Native.Quic.MsQuic.OpenSSL < 2.4.19Microsoft.Native.Quic.MsQuic.Schannel < 2.4.19Patched in:
Microsoft.Native.Quic.MsQuic.OpenSSL 2.5.10Microsoft.Native.Quic.MsQuic.Schannel 2.5.10Microsoft.Native.Quic.MsQuic.OpenSSL 2.4.19Microsoft.Native.Quic.MsQuic.Schannel 2.4.19Connected by shared product, vendor, weakness, or advisory.
CVE-2026-88141High· 7.0Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.
CVE-2026-87691High· 7.8Use after free in Windows Management Services allows an authorized attacker to elevate privileges locally.
CVE-2026-85851High· 7.8Use after free in Windows SmartScreen allows an authorized attacker to elevate privileges locally.
CVE-2026-85804High· 7.8Use after free in Windows Win32 Kernel Subsystem allows an authorized attacker to elevate privileges locally.
CVE-2026-85803High· 7.0Use after free in Windows Camera Frame Server Monitor allows an authorized attacker to elevate privileges locally.
CVE-2026-85357High· 7.0Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Phone Service allows an authorized attacker to elevate privileges locally.