CVE-2026-18321

MEDIUM

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

CVSS v3.1 Score

4.7

MEDIUM

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

Attack Vector

LOCAL

Complexity

HIGH

Privileges

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Published: 7/31/2026Modified: 7/31/2026

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