CVE-2026-18321CWE-120

CVE-2026-18321

Medium · published July 31, 2026

CVSS v3.1
4.7
EPSS
0%
Percentile
1.3
In the wild
Unconfirmed
What it is

Buffer overflow in NTPsec's Zyfer refclock allows local attacker to crash ntpd

The record
Technical detail
CVSS v3.1
4.7 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00111 · 1.3th percentile
Weakness
CWE-120 · Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Published
2026-07-31T23:17Z
References (1)
https://gitlab.com/NTPsec/ntpsec/-/work_items/890 · [email protected]
EPSS history
Timeline
  • 31 JUL 18:04Z
    Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') in ntpsec
    cvelistv5