CVE-2026-18321CVE-2026-18321MEDIUM4.7Buffer overflow in NTPsec's Zyfer refclock allows local attacker to crash ntpdPublished: 2026-07-31CVSS 3.xMEDIUM 4.7CVSS:3.x/CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:HReferenceshttps://gitlab.com/NTPsec/ntpsec/-/work_items/890