Vulnerability DatabaseCVE-2026-18321
Mend.io Vulnerability Database
The largest open source vulnerability database
What is a Vulnerability ID?
New vulnerability? Tell us about it!
CVE-2026-18321
Published:July 31, 2026
Updated:August 06, 2026
Buffer overflow in NTPsec's Zyfer refclock allows local attacker to crash ntpd
Affected Packages
https://gitlab.com/NTPsec/ntpsec.git (SCM_GIT):
Affected version(s) >=NTPsec_0_9_0 <NTPsec_1_2_5
Fix Suggestion:
Update to version NTPsec_1_2_5
Related Resources (1)
https://gitlab.com/NTPsec/ntpsec/-/work_items/890
Do you need more information?
Contact Us
CVSS v4
Base Score:
5.7
Attack Vector
LOCAL
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
4.7
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CWE-120
EPSS
Base Score:
0.08