RCE in Powerdns Authoritative

CVE-2026-42000

Insufficient Validation of Names During AXFR

Vulnerability class: Command Injection (OS Command Injection)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.005 (43.0th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 43.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-42000: held from 0.002 to 0.005.

EPSS over last 30 days · oldest: 0.002 · newest: 0.005 · change: +0.003

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-42000?
CVE-2026-42000 is a medium-severity vulnerability in Powerdns Authoritative, classified under Command Injection. CVSS score: 6.8/10. Published 2026-05-21.
How severe is CVE-2026-42000?
Medium severity. CVSS v3 base score is 6.8 out of 10.