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Vulnerability record · CVE-2026-42255 · published 26 April 2026

CVE-2026-42255: Technitium dnsserver vulnerability

Technitium · Dnsserver

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

6.5 CVSS 3.1 Medium EPSS 0.35% · top 73.8% CWE-684 · CWE-684
6.5CVSS 3.1 base score
0.35%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
17 Jun 2026Last modified by NVD

Description

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

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/TechnitiumSoftware/DnsServer/blob/master/CHANGELOG.md#technitium-dns-server-change-log Release Notes

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-42255), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.