How severe is CVE-2026-52690?

CVE-2026-52690 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-52690 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-52690?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-52690 have an EU (EUVD) identifier?

Yes. CVE-2026-52690 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-39360.

When was CVE-2026-52690 published?

CVE-2026-52690 was published on 2026-06-25.

CVE-2026-52690

CVE-2026-52690 is a medium-severity vulnerability with a CVSS 3.x base score of 5.9. 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-290.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
EPSS exploit prediction: 0% (27th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-39360
Weakness: CWE-290
Published: 2026-06-25
Last modified: 2026-06-25

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.

Frequently asked questions

What is CVE-2026-52690?: 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.
How severe is CVE-2026-52690?: CVE-2026-52690 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-52690 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-52690?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-52690 have an EU (EUVD) identifier?: Yes. CVE-2026-52690 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-39360.
When was CVE-2026-52690 published?: CVE-2026-52690 was published on 2026-06-25.

References

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

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