HIGH

CVE-2026-66374

CVSS v3

8.1

HIGH

EPSS Score

0.4%

exploit probability

CISA KEV

No

known exploited

Exploitation

—

SSVC status

Description

Knot Resolver before 6.4.1 allows remote code execution via a heap-based buffer overflow in the DoQ (DNS-over-QUIC) receive path.

Technical details

CVSS v3 Vector
3.1
Published
7/25/2026
Last Modified
7/25/2026

Frequently asked questions

What is CVE-2026-66374?

Knot Resolver before 6.4.1 allows remote code execution via a heap-based buffer overflow in the DoQ (DNS-over-QUIC) receive path.

Is CVE-2026-66374 actively exploited?

Active exploitation of CVE-2026-66374 has not been confirmed. The EPSS score is 0.4%, indicating the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-66374?

CVE-2026-66374 has a CVSS v3 base score of 8.1 (HIGH severity), with vector string 3.1.

Is CVE-2026-66374 affecting your environment?

Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.

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