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PatchSiren cyber security CVE debrief

CVE-2026-33612 PowerDNS CVE debrief

A malicious authoritative server can send a crafted zone via the ZoneToCache function that leads to cache poisoning. This vulnerability affects PowerDNS configurations and could lead to potential cache poisoning attacks. Defenders responsible for PowerDNS configurations and DNS traffic monitoring should assess exposure and prioritize verification and updates to prevent potential cache poisoning attacks. The vulnerability has a CVSS score of 7.5 and is classified as HIGH severity. Further investigation is required to determine the affected versions and potential impact.

Vendor
PowerDNS
Product
Recursor
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-25
Original CVE updated
2026-10-25
Advisory published
2026-06-25
Advisory updated
2026-10-25

Who should care

Defenders responsible for PowerDNS configurations and DNS traffic monitoring should assess exposure and prioritize verification and updates to prevent potential cache poisoning attacks.

Why it matters

Defenders should prioritize verifying and updating their PowerDNS configurations to prevent potential cache poisoning attacks. The vulnerability has a CVSS score of 7.5 and is classified as HIGH severity. Further investigation is required to determine the affected versions and potential impact.

  • Potential cache poisoning attacks may require verification of PowerDNS configurations
  • Defenders may need to implement additional security measures to prevent cache poisoning attacks
  • DNS traffic monitoring may be necessary to detect suspicious activity

Technical summary

A malicious authoritative server can send a crafted zone via the ZoneToCache function that leads to cache poisoning. The vulnerability has a CVSS score of 7.5 and is classified as HIGH severity. This vulnerability affects PowerDNS configurations and could lead to potential cache poisoning attacks. Defenders should prioritize verifying and updating their PowerDNS configurations to prevent potential cache poisoning attacks.

Defensive priority

Defenders should prioritize verifying and updating their PowerDNS configurations to prevent potential cache poisoning attacks.

Recommended defensive actions

  • Verify and update PowerDNS configurations to prevent potential cache poisoning attacks
  • Monitor DNS traffic for suspicious activity
  • Implement additional security measures to prevent cache poisoning attacks

Evidence notes

The CVE record and NVD entry provide limited information about the vulnerability. Further investigation is required to determine the affected versions and potential impact.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-33612 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-33612

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-33612 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-33612

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.