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MEDIUM · 4.4

CVE-2026-33601

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...

Vulnerability Description

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.

CVSS Score

4.4

MEDIUM

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

Affected Products

VendorProductVersions
PowerdnsRecursor>= 5.2.0, < 5.2.9

Related Weaknesses (CWE)

CWE-476

References

FAQ

What is CVE-2026-33601?

CVE-2026-33601 is a vulnerability with a CVSS score of 4.4 (MEDIUM). 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...

How severe is CVE-2026-33601?

CVE-2026-33601 has been rated MEDIUM with a CVSS base score of 4.4/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-33601?

Check the references section above for vendor advisories and patch information. Affected products include: Powerdns Recursor.