What is the CVSS score of CVE-2025-59023?

CVE-2025-59023 has a CVSS 3.1 base score of 8.2 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L. EPSS exploitation probability: 0.0%.

How to fix or mitigate CVE-2025-59023?

Within 24 hours: Identify all PowerDNS Recursor instances in your environment and assess exposure. Within 7 days: Implement compensating controls (query rate limiting, DNS firewall rules filtering malformed packets, network segmentation isolating Recursor from untrusted networks) and monitor for suspicious DNS activity. Within 30 days: Establish vendor contact to obtain patch timeline and prepare deployment infrastructure; evaluate alternative DNS solutions if patch delays are extended.

Recursor CVE-2025-59023

HIGH

Authentication Bypass by Capture-replay (CWE-294)

2026-02-09 security@open-xchange.com

Information Disclosure Powerdns Recursor

8.2

CVSS 3.1 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-294 OWASP Top 10:2025 A07:2025 - Authentication Failures ASVS 5.0 V6 - Authentication Replay attack prevention
Impact	CVSS 8.2 (HIGH). Attack vector: Network. Complexity: Low. Privileges required: None. User interaction: None.
Exploit ScenarioDerived	An attacker could exploit this vulnerability to compromise the affected system.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

No patch listed yet 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

Crafted delegations or IP fragments can poison cached delegations in Recursor. [CVSS 8.2 HIGH]

RemediationAI

Monitor vendor advisories for a patch. Restrict network access to the affected service where possible.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

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

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 8.2 HIGH

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

SUSE HIGH

Primary rating from NVD.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

Low

DescriptionCVE.org

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

Executive ViewAI

Why It Matters

CVE-2025-59023 affects PowerDNS Recursor instances, enabling attackers to poison DNS cache through crafted delegations or IP fragments, potentially redirecting user traffic to malicious sites. This threatens all organizations relying on affected Recursor deployments for DNS resolution, impacting service availability and user trust.

Business Impact: High

Compensating Controls

Implement DNS query rate limiting to reduce poisoning attack surface; deploy DNS firewall rules to reject malformed delegations and fragmented packets; enable strict DNSSEC validation where possible; segment Recursor instances from untrusted networks; increase DNS query logging and anomaly detection; consider disabling recursive resolution from untrusted sources if operationally feasible. Monitor vendor advisories closely for patch availability.

Threat Intelligence Overview

EPSS Score

0.0%

Top 100% exploitable

Data Quality

4 sources

Confidence: Medium

NVD

CVE.org

EPSS Vendor

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV No

Public POC No

EPSS 0.0%

Patch available No

Active threat No

Deciding rule

HIGH severity (CVSS 7.0-8.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

None

System Exposure· derived

Open

Automatable· derived

Yes

Human Impact

High

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +41

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.