CVE-2026-18321 | NTPsec up to 1.2.4 Zyfer refclock buffer overflow

A vulnerability identified as problematic has been detected in NTPsec up to 1.2.4. Affected by this vulnerability is an unknown functionality of the component Zyfer refclock. The manipulation leads to buffer overflow.

This vulnerability is documented as CVE-2026-18321. The attack needs to be performed locally. There is not any exploit available.

You should upgrade the affected component.