CVE-2026-62815: microsoft windows_11_23h2, microsoft windows_11_24h2, microsoft windows_11_25h2

CVSS 9.8 (critical) · published 2026-08-11

Use after free in Microsoft QUIC allows an unauthorized attacker to execute code over a network.

Affected products (NVD): microsoft windows_11_23h2, microsoft windows_11_24h2, microsoft windows_11_25h2, microsoft windows_11_26h1, microsoft windows_server_2022, microsoft windows_server_2025

Fixed in (NVD): 10.0.22631.7517, 10.0.26100.9106, 10.0.26200.9106, 10.0.28000.2704, 10.0.20348.5440, 10.0.26100.33222

Weakness: CWE-416

Source: NVD CVE-2026-62815

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62815

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