---
id: CVE-2026-102486
title: Out-of-bounds Read in ntpsec
summary: >-
  Out-of-bounds read in NTS extension field parsing in NTPsec ntpd 1.1.4 through
  1.2.5 allows a remote attacker to crash the daemon via an NTS Authenticator
  and Encrypted Extension Fields (AEEF) field with an oversized nonce length.
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-125
vendor: NTPsec
product: ntpsec
affected:
  - ntpsec >= 1.1.4 < 1.2.6
published: '2026-10-21'
updated: '2026-10-21'
sourceUpdated: '2026-10-21T15:04:01.274Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-102486'
references:
  - url: 'https://gitlab.com/NTPsec/ntpsec/-/work_items/891'
  - url: 'https://gitlab.com/NTPsec/ntpsec/-/work_items/895'
  - url: 'https://gitlab.com/NTPsec/ntpsec/-/commit/7cc079387'
tags:
  - cve.org
ingestedAt: '2026-10-21T16:05:17.710Z'
---

## Overview

Out-of-bounds read in NTS extension field parsing in NTPsec ntpd 1.1.4 through 1.2.5 allows a remote attacker to crash the daemon via an NTS Authenticator and Encrypted Extension Fields (AEEF) field with an oversized nonce length.

## Affected

- `ntpsec >= 1.1.4 < 1.2.6`

## Remediation

Upgrade to version 1.2.6