---
id: CVE-2026-102483
title: Reachable Assertion in ntpsec
summary: >-
  Reachable exit in NTPsec ntpd 1.1.4 through 1.2.5 allows a remote attacker to
  terminate the daemon via an NTS request with excess NTS Cookie Placeholder
  extension fields.
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-617
vendor: NTPsec
product: ntpsec
affected:
  - ntpsec >= 1.1.4 < 1.2.6
published: '2026-10-21'
updated: '2026-10-21'
sourceUpdated: '2026-10-21T15:03:41.276Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-102483'
references:
  - url: 'https://gitlab.com/NTPsec/ntpsec/-/work_items/899'
  - url: 'https://gitlab.com/NTPsec/ntpsec/-/commit/df83f3c4f'
tags:
  - cve.org
ingestedAt: '2026-10-21T16:05:17.711Z'
---

## Overview

Reachable exit in NTPsec ntpd 1.1.4 through 1.2.5 allows a remote attacker to terminate the daemon via an NTS request with excess NTS Cookie Placeholder extension fields.

## Affected

- `ntpsec >= 1.1.4 < 1.2.6`

## Remediation

Upgrade to version 1.2.6