CVE-2026-66374
HighPublished
Knot Resolver before 6.4.1 allows remote code execution via a heap-based buffer overflow in the DoQ (DNS-over-QUIC) receive path.
- Published
- Jul 25, 2026
- Updated
- Jul 27, 2026
- Assigning CNA
- mitre
- Evidence observed
- Aug 28, 2026
Primary CVSS
8.1/ 10High
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:L0.5%
Low · next 30 days
- Percentile
- 41.7%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
Knot Resolver before 6.4.1 allows remote code execution via a heap-based buffer overflow in the DoQ (DNS-over-QUIC) receive path.
Sources
1- knot-doqExploit
CVE-2026-66374: Knot Resolver 6.3.0 DNS-over-QUIC heap overflow (RCE)
Responsible use
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