CVE-2026-100219

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

Scores

CVSS out of 10, critical severity.

EPSS chance of exploitation in the next 30 days.

Published

13 October 2026

Last changed

14 October 2026

NVD status

Undergoing Analysis

Severity

Critical, CVSS 9.8 out of 10 (version 3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness

Known exploited

Not in the CISA Known Exploited Vulnerabilities catalogue in this build.

EPSS

1.0% chance of exploitation activity in the next 30 days (percentile 62).

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