CVE-2025-59024Network attack vector

DNS cache poisoning via spoofed UDP fragments

Published Feb 9, 2026 · Updated Feb 9, 2026

DNS cache poisoning in PowerDNS Recursor allows remote attackers to corrupt cached delegations through spoofed UDP IP fragments. The resolver insufficiently validates delegation information reassembled from received IP fragments before accepting it from authoritative-server responses. No authentication or user interaction is required, but exploitation requires a high-complexity packet-spoofing attack and does not compromise the host.

CVSS severity6.5
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

DNS cache poisoning in PowerDNS Recursor allows remote attackers to corrupt cached delegations through spoofed UDP IP fragments. The resolver insufficiently validates delegation information reassembled from received IP fragments before accepting it from authoritative-server responses. No authentication or user interaction is required, but exploitation requires a high-complexity packet-spoofing attack and does not compromise the host.

The record

CVE
CVE-2025-59024
Published
Feb 9, 2026
Updated
Feb 9, 2026
Vendor
PowerDNS
Product
PowerDNS Recursor
Classifications
CWE-345, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.1.0 <5.1.8
  2. Affected versionversion=5.2.0 <5.2.6
  3. Affected versionversion=5.3.0 <5.3.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

PowerDNS · PowerDNS Recursorversion=5.1.0 <5.1.8; version=5.2.0 <5.2.6; version=5.3.0 <5.3.1

Published CVSS scores

6.5PowerDNSCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-345Insufficient Verification of Data Authenticity
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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