CVE-2026-18321

—

CVSS 3.1

4.7 medium

EPSS

<1%p0

Published

Jul 31, 2026 (Jul 31, 2026)

Modified

Aug 28, 2026

Description

Buffer overflow in NTPsec's Zyfer refclock allows local attacker to crash ntpd

Weakness: CWE-120
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD CVE.org GitHub PoCs EPSS (0.1%)

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