What is CVE-2025-59023?

CVE-2025-59023 is a high-severity vulnerability in Powerdns Recursor, classified under Authentication Bypass by Capture-replay. CVSS score: 8.2/10. Published 2026-02-09.

How severe is CVE-2025-59023?

High severity. CVSS v3 base score is 8.2 out of 10.

Vulnerability in Powerdns Recursor

CVE-2025-59023

Crafted delegations or IP fragments can poison cached delegations in Recursor.

Published 2026-02-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L.

EPSS exploit prediction

EPSS: 0.003 (18.7th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 18.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000

Affected products

Powerdns Recursor — versions 5.3.0, 5.2.0, 5.1.0

Weakness classification (CWE)

CWE-294 — Authentication Bypass by Capture-replay

References

docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2025-06.html (Vendor Advisory)

Frequently asked questions

What is CVE-2025-59023?: CVE-2025-59023 is a high-severity vulnerability in Powerdns Recursor, classified under Authentication Bypass by Capture-replay. CVSS score: 8.2/10. Published 2026-02-09.
How severe is CVE-2025-59023?: High severity. CVSS v3 base score is 8.2 out of 10.