Cached Delegation Poisoning Vulnerability in PowerDNS Recursor
CVE-2025-59024

6.5MEDIUM

Key Information:

Vendor

Powerdns

Status
Recursor
Vendor
CVE Published:
9 February 2026

What is CVE-2025-59024?

A vulnerability in PowerDNS Recursor allows attackers to exploit crafted delegations or IP fragments. This can lead to the poisoning of cached delegations, potentially affecting DNS query responses and causing service disruptions or misdirected traffic. It's crucial for users of PowerDNS Recursor to apply necessary patches and security updates to mitigate these risks.

Affected Version(s)

Recursor 5.3.0 < 5.3.1

Recursor 5.2.0 < 5.2.6

Recursor 5.1.0 < 5.1.8

References

https://docs.powerdns.com/recursor/security-advisories/po...

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Yuxiao Wu from Tsinghua University
Yunyi Zhang from Tsinghua University
Baojun Liu from Tsinghua University
Haixin Duan from Tsinghua University
Shiming Liu from Network and Information Security Lab, Tsinghua University
.