PowerDNS Recursor EUVD-2026-24733

| CVE-2026-33601 MEDIUM
NULL Pointer Dereference (CWE-476)
2026-04-22 [email protected]
Denial Of Service Null Pointer Dereference
4.4
CVSS 3.1
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CVSS VectorNVD

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
Attack Vector
Network
Attack Complexity
High
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

2
Analysis Generated
Apr 22, 2026 - 13:10 vuln.today
Patch available
Apr 22, 2026 - 11:16 EUVD

DescriptionNVD

If you use the zoneToCache function with a malicious authoritative server, an attacker can send a zone that result in a null pointer dereference, caused by a missing consistency check and leading to a denial of service.

AnalysisAI

Denial of service in PowerDNS Recursor via null pointer dereference in the zoneToCache function when processing zone data from a malicious authoritative server. Affects Recursor 5.2.0 through 5.4.0 and requires high privileges and non-standard network conditions to exploit, resulting in service availability impact but not data compromise. …

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EUVD-2026-24733 vulnerability details – vuln.today
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