CVE-2019-6443

9.1 CRITICAL 67% exploit odds Drop everything No fix listed Memory safety

What it is

An issue was discovered in NTPsec before 1.1.3. Because of a bug in ctl_getitem, there is a stack-based buffer over-read in read_sysvars in ntp_control.c in ntpd.

At a glance

Exploitability: Can be exploited over the network without logging in. High risk of data exposure, service disruption.
Exploit odds: 66.9% chance of exploitation in the next 30 days (EPSS). Higher than most.
Fix: No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

2019-01-15 00:00 UTC ReservedThe CVE id was reserved by its CNA
2019-01-16 05:29 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-17 02:39 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 66.9% in the next 30 days (EPSS).
Severity: 9.1 CRITICAL (CVSS).
Fix: none linked yet, which raises it.
It meets the bar for Drop everything: critical, and exploited or very likely to be.

Details

Published: 2019-01-16 05:29 UTC
Last modified: 2026-06-17 02:39 UTC
Exploit probability: 66.9% · EPSS, next 30 days
Weakness: CWE-125 · Out-of-bounds read
Record status: Modified

Affected

Ntpsec < 1.1.3

Attack profile CVSS 3.0 · 9.1

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: None
Availability: High

Raw vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2019-6443.md and follow it. Check whether this project is affected by CVE-2019-6443. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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References

NVD record · CVE.org record