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Medium 4.7Published Jul 31, 2026
CVE-2026-18321Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') in ntpsec
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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Buffer overflow in NTPsec's Zyfer refclock allows local attacker to crash ntpd
- CVSS
- 4.7 MEDIUM (v3.1, CNA)CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-120
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitLab
- NVD analysis
- Awaiting Analysis
- Record last updated
- Jul 31, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
NTPsec ntpsec ntpsec:ntpsec (from the name) | before 1.2.5 | CNA record |
References
- https://gitlab.com/NTPsec/ntpsec/-/work_items/890
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.