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Vulnerabilities

Vulnerability · CVE-2025-59023

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

Published Feb 9, 2026 · catalog updated Feb 9, 2026 · PowerDNS Recursor

Last checked Nov 5, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-59023. EPSS is 0.31%. Act only if a listed version of PowerDNS Recursor is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
High8.2
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.31%
Remediation
Version ranges on file
Affected products
vendor PowerDNS Recursor 5.2.0 <5.2.6

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

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor PowerDNS Recursor 5.2.0 <5.2.65.2.0 <5.2.6

How to fix CVE-2025-59023

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-59023. EPSS is 0.31%. Act only if a listed version of PowerDNS Recursor is installed.

Which versions are affected?

Compare what you have installed with PowerDNS Recursor 5.2.0 <5.2.6 5.2.0 <5.2.6. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.31%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Feb 9, 2026 · EUVD

    Detected

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

  2. Feb 9, 2026 · EUVD

    Updated

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

Sources

  • CVE.orgVulnerability recordCVE-2025-59023

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-59023

    30-day exploitation probability 0.31%

    first.org
  • EUVDVulnerability recordEUVD-2025-207361

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

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 5, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 5, 2026
  • CVE.orgNov 4, 2026
  • EUVDNov 3, 2026