Medium severity · published Jun 25, 2026
CVE-2026-52690
Spoofed answers can mark an authoritative non-EDNS capable
5.9
CVSS
0.4%
EPSS
No
On KEV
Description
Spoofing replies to Recursor might mark an IP of an authoritative server as not supporting EDNS, causing valdiation of DNSSEC records served by that server to fail.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 37% 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-2026-52690
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-52690
docs.powerdns.com
https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-08.html
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