CVE-2026-62815 Security Details

CVE ID

CVE-2026-62815

CWE

CWE-416

CVE Description

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

Published

Sep 11, 2026

CVSS Score & Severity

9.8Critical

CVSS Vector

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

EPSS Score

0.974%

Malware

malware

KEV Status

Not in KEV Catalog: No known exploits

Affected Ecosystems

affected

Source

National Vulnerability Database

References

GitHub · PR #6217PROJECT

GitHub · microsoft/msquicPROJECT