Vulnerability in Technitium Dnsserver

CVE-2026-42255

Technitium DNS Server before 15.0 allows DNS traffic amplification via cyclic name server delegation.

EPSS: 0.000 (15.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:L.

Affected products

Technitium Dnsserver — versions 0

Weakness classification (CWE)

CWE-684

References

cve@mitre.org (Release Notes)

Frequently asked questions

What is CVE-2026-42255?: CVE-2026-42255 is a high-severity vulnerability in Technitium Dnsserver, classified under CWE-684. CVSS score: 7.2/10. Published 2026-04-26.
How severe is CVE-2026-42255?: High severity. CVSS v3 base score is 7.2 out of 10.