How severe is CVE-2026-33612?

CVE-2026-33612 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability low.

Is CVE-2026-33612 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-33612?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-33612 have an EU (EUVD) identifier?

Yes. CVE-2026-33612 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-39352.

When was CVE-2026-33612 published?

CVE-2026-33612 was published on 2026-06-25.

CVE-2026-33612

CVE-2026-33612 is a high-severity vulnerability with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-349.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (2nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-39352
Weakness: CWE-349
Published: 2026-06-25
Last modified: 2026-06-25

Description

A malicious authoritative server can send a crafted zone via the ZoneToCache function that leads to cache poisoning.

Frequently asked questions

What is CVE-2026-33612?: A malicious authoritative server can send a crafted zone via the ZoneToCache function that leads to cache poisoning.
How severe is CVE-2026-33612?: CVE-2026-33612 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability low.
Is CVE-2026-33612 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-33612?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-33612 have an EU (EUVD) identifier?: Yes. CVE-2026-33612 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-39352.
When was CVE-2026-33612 published?: CVE-2026-33612 was published on 2026-06-25.

References

https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-08.html

Other CWE-349 vulnerabilities

CVE-2026-42960 — Critical (CVSS 10.0): NLnet Labs Unbound up to and including version 1.25.0 is vulnerable to poisoning via promiscuous records for the…
CVE-2026-41120 — Critical (CVSS 9.8): Dell Wyse Management Suite, versions prior to WMS 5.5 HF1, contain an Acceptance of Extraneous Untrusted Data With…
CVE-2026-45602 — Critical (CVSS 9.1): No cwe for this issue in Windows DHCP Server allows an unauthorized attacker to perform tampering over a network.
CVE-2025-5994 — High (CVSS 8.7): A multi-vendor cache poisoning vulnerability named 'Rebirthday Attack' has been discovered in caching resolvers that…
CVE-2025-40778 — High (CVSS 8.6): Under certain circumstances, BIND is too lenient when accepting records from answers, allowing an attacker to inject…
CVE-2025-40776 — High (CVSS 8.6): A `named` caching resolver that is configured to send ECS (EDNS Client Subnet) options may be vulnerable to a…

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