CVE-2026-102483 NTPsec ntpd - Denial of Service

NTPsec ntpd 1.1.4 through 1.2.5 contains a denial of service caused by reachable exit via NTS request with excess NTS Cookie Placeholder extension fields, letting remote attackers terminate the daemon, exploit requires crafted NTS request.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
21 October 2026
Updated
22 October 2026
Weakness
CWE-617

Vendor fix

Update to the latest version beyond 1.2.5.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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