CVE-2026-18321
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') in ntpsec
CVSS Score
4.7
EPSS Score
0.0%
EPSS Percentile
0th
Buffer overflow in NTPsec's Zyfer refclock allows local attacker to crash ntpd
| CWE | CWE-120 |
| Vendor | ntpsec |
| Product | ntpsec |
| Published | Jul 31, 2026 |
| Last Updated | Jul 31, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
NTPsec / ntpsec
0 < 1.2.5
References
Credits
Youngjoon Kim of Team Atlanta