Is CVE-2026-33612 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-33612 being exploited in the wild.

How severe is CVE-2026-33612?

High severity, with a CVSS score of 7.5, published 25 June 2026.

Which products and versions are affected?

Powerdns Recursor 5.2.0 to 5.2.10, 5.3.0 to 5.3.7, 5.4.0 to 5.4.2.

Is there a fix for CVE-2026-33612?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-33612 attacked?

It is attacked over the network, in a hosted service.

Am I affected by CVE-2026-33612?

Check whether you run Powerdns Recursor at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-33612: PowerDNS Recursor cache poisoning in ZoneToCache function

CVE-2026-33612 · Severity: high · CVSS 7.5 · Published 2026-06-25

PowerDNS Recursor, a tool used by internet service providers to look up website addresses for users, is vulnerable to a cache poisoning attack. A malicious server can send specially crafted data that tricks the recursor into storing incorrect information in its memory. This could allow an attacker to redirect users to fraudulent websites or disrupt internet services.

Technologies: Powerdns Recursor. Vendors: Powerdns.

Quick answers

Is CVE-2026-33612 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-33612 being exploited in the wild.
How severe is CVE-2026-33612?: High severity, with a CVSS score of 7.5, published 25 June 2026.
Which products and versions are affected?: Powerdns Recursor 5.2.0 to 5.2.10, 5.3.0 to 5.3.7, 5.4.0 to 5.4.2.
Is there a fix for CVE-2026-33612?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-33612 attacked?: It is attacked over the network, in a hosted service.
Am I affected by CVE-2026-33612?: Check whether you run Powerdns Recursor at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A cache poisoning vulnerability exists in the PowerDNS Recursor's 'Zone to cache' module (specifically within rec-zonetocache.cc). An attacker controlling a malicious authoritative DNS server can provide a crafted zone file during a ZoneToCache operation. This allows the attacker to inject unauthorized DNS records into the recursor's cache, potentially redirecting traffic for arbitrary domains. The attack requires the ZoneToCache feature to be active and the recursor to interact with the malicious server. Patches are available in versions 5.2.11, 5.3.8, and 5.4.3.

Affected products

PowerDNS Recursor 5.2.0 to 5.2.10, 5.3.0 to 5.3.7, 5.4.0 to 5.4.2

Timeline

2026-06-25: disclosed
2026-06-25: advisory

References

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