CVE-2026-42000

Name: CVE-2026-42000
Creator: NVD / NIST
Published: 2026-05-21T10:16:25.563+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.6/10EPSS 0.24%

Last modified Jun 17, 2026

CVE-2026-42000 is a high-severity vulnerability rated 8.6/10 on the CVSS scale. Insufficient Validation of Names During AXFR. EPSS estimates a 0.24% chance of exploitation in the next 30 days.

Description

Insufficient Validation of Names During AXFR

Metrics

CVSS 3.1

8.6/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

EPSS Probability

0.24%

15.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-77

Affected Software

Vendor	Product	Versions
Powerdns	Authoritative	< 4.9.15
Powerdns	Authoritative	>= 5.0.0, < 5.0.5

References

https://docs.powerdns.com/authoritative/security-advisories/powerdns-advisory-powerdns-2026-06.htmlBroken Link

Timeline

Published: May 21, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-42000?

Insufficient Validation of Names During AXFR

How severe is CVE-2026-42000?

CVE-2026-42000 has a CVSS score of 8.6/10 (HIGH severity). The EPSS model estimates a 0.24% probability of exploitation in the next 30 days.

How do I fix CVE-2026-42000?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-42000?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST