CVSS 9.8 · CRITICAL
CVE-2026-62815Unauthenticated RCE in Microsoft QUIC
Use after free in Microsoft QUIC allows an unauthorized attacker to execute code over a network.
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Se ha identificado una vulnerabilidad de ejecución remota de código (RCE) en la implementación de Microsoft QUIC. Este componente es fundamental para el tráfico HTTP/3 y SMB sobre QUIC en entornos Windows y aplicaciones .NET, permitiendo ataques sin autenticación a través de la red.
Relevant roles
BackendWindowsCC++CloudCyberSecurity
Severity
Score: 9.8(CRITICAL)
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HAV: NETWORK
AC: LOW
PR: NONE
UI: NONE
S: UNCHANGED
C: HIGH
I: HIGH
A: HIGH
Weakness (CWE):
CWE-416EPSS
No EPSS score yet (CVE may be too fresh).
Technical description
Use after free in Microsoft QUIC allows an unauthorized attacker to execute code over a network.
Published: 8/11/2026, 5:18:35 PM
Last modified: 8/11/2026, 5:18:35 PM