CVE-2026-42255
Received Received - Intake
DNS Amplification via Cyclic Delegation in Technitium DNS Server

Publication date: 2026-04-26

Last updated on: 2026-04-29

Assigner: MITRE

Description
Technitium DNS Server before 15.0 allows DNS traffic amplification via cyclic name server delegation.
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Meta Information
Published
2026-04-26
Last Modified
2026-04-29
Generated
2026-06-16
AI Q&A
2026-04-26
EPSS Evaluated
2026-06-15
NVD
CVE-2026-42255
EUVD
EUVD-2026-25688
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
technitium dnsserver to 15.0 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-684 The code does not function according to its published specifications, potentially leading to incorrect usage.
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Executive Summary

This vulnerability exists in Technitium DNS Server versions before 15.0. It allows an attacker to exploit DNS traffic amplification through cyclic name server delegation.

Impact Analysis

The vulnerability can lead to DNS traffic amplification attacks, which may result in increased network traffic and potential denial of service conditions. The CVSS score indicates it can cause integrity and availability impacts without requiring privileges or user interaction.

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