High severity · published Jun 25, 2026
CVE-2026-33612
ZoneToCache can poison the cache
7.5
CVSS
0.1%
EPSS
No
On KEV
Description
A malicious authoritative server can send a crafted zone via the ZoneToCache function that leads to cache poisoning.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:L
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
Low
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 4% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RE
Recursor · PowerDNS
5.2.0 before 5.2.11; 5.3.0 before 5.3.8; 5.4.0 before 5.4.3 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-33612
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-33612
docs.powerdns.com
https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-08.html
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