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CVE-2026-18321mediumCWE-120

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') in ntpsec

13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 4.7epss 0.1%
exploitation probability
0.1%top 100% of all CVEs
observed exploitation
nono source reports it
Buffer overflow in NTPsec's Zyfer refclock allows local attacker to crash ntpd
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected products
NTPsec · ntpsec