CVE-2026-26076CWE-770

ntpd-rs affected by excessive CPU load from malformed packets

Medium · published February 12, 2026

CVSS v4.0
6.9
EPSS
1%
Percentile
52.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
6.9 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
EPSS
0.00707 · 52.9th percentile
Weakness
CWE-770 · Allocation of Resources Without Limits or Throttling
Published
2026-02-12T21:48Z
EPSS history
Timeline
  • 12 FEB 21:48Z
    ntpd-rs affected by excessive CPU load from malformed packets
    cvelistv5