CVE-2026-26076

HIGH

ntpd-rs < 1.7.1 - Denial of Service via Malformed NTS Packets

Title source: llm
STIX 2.1

Description

ntpd-rs is a full-featured implementation of the Network Time Protocol. Prior to 1.7.1, an attacker can remotely induce moderate increases (2-4 times above normal) in cpu usage. When having NTS enabled on an ntpd-rs server, an attacker can create malformed NTS packets that take significantly more effort for the server to respond to by requesting a large number of cookies. This can lead to degraded server performance even when a server could otherwise handle the load. This vulnerability is fixed in 1.7.1.

References (3)

Core 3

Scores

CVSS v3 7.5
EPSS 0.0035
EPSS Percentile 26.6%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-770
Status published
Products (1)
tweedegolf/ntpd-rs < 1.7.1
Published Feb 12, 2026
Tracked Since Feb 18, 2026