Cache Poisoning Vulnerability in PowerDNS Recursor
CVE-2025-59023

8.2HIGH

Key Information:

Vendor

Powerdns

Status
Recursor
Vendor
CVE Published:
9 February 2026

What is CVE-2025-59023?

A vulnerability exists in PowerDNS Recursor where crafted delegations or IP fragments can corrupt cached delegations, potentially leading to unauthorized access to DNS data. This exploit could allow attackers to manipulate DNS responses, impacting the integrity and reliability of domain resolution.

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:
8.2
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
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
.