CVE-2026-102486 NTPsec ntpd - Denial of Service

NTPsec ntpd 1.1.4 through 1.2.5 contains an out-of-bounds read caused by improper parsing of NTS Authenticator and Encrypted Extension Fields with oversized nonce length, letting remote attackers crash the daemon, exploit requires crafted NTS AEEF field.

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-125

Vendor fix

Update to a version later than 1.2.5 or the latest available version.

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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