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Review reviewHigh

CVE-2026-33612

PowerDNS Recursor

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

CVSS
7.5
EPSS
0.11%
1.81% percentile
CISA KEV
Not listed
Published
2026.06.25
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.11%
Technical severityCVSS 7.5

Vulnerability overview

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

Affected product and versions

Product
PowerDNS Recursor
Affected versions
5.2.0, 5.3.0, 5.4.0
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that PowerDNS Recursor and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:L
CWE
CWE-349
CVE-2026-33612 — PowerDNS Recursor | SECUFOCUS NOW