CVE-2026-42255 - Vulnerability Details - OpenCVE

ReportizFlow

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

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact None

Integrity Impact Low

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable yes

Technical Impact partial

Vendors	Products
Technitium	Dnsserver

Configuration 1 [-]

cpe:2.3:a:technitium:dnsserver:*:*:*:*:*:*:*:*

No data.

References

Link	Providers
https://github.com/TechnitiumSoftware/DnsServer/blob/master/CHANGELOG.md#technitium-dns-server-change-log

History

Tue, 28 Apr 2026 13:45:00 +0000

Type	Values Removed	Values Added
Title		DNS Amplification via Cyclic Name Server Delegation

Mon, 27 Apr 2026 15:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Sun, 26 Apr 2026 04:15:00 +0000

Type	Values Removed	Values Added
Description		Technitium DNS Server before 15.0 allows DNS traffic amplification via cyclic name server delegation.
First Time appeared		Technitium Technitium dnsserver
Weaknesses		CWE-684
CPEs		cpe:2.3:a:technitium:dnsserver::::::::
Vendors & Products		Technitium Technitium dnsserver
References		https://github.com/TechnitiumSoftware/DnsServer/blob/master/CHANGELOG.md#technitium-dns-server-change-log
Metrics		cvssV3_1 `{'score': 7.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:L'}`

MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2026-04-26T02:48:44.810Z

Updated: 2026-04-27T13:31:57.425Z

Reserved: 2026-04-26T02:48:44.278Z

Link: CVE-2026-42255

Vulnrichment

Updated: 2026-04-27T13:20:28.762Z

NVD

Status : Analyzed

Published: 2026-04-26T04:16:05.787

Modified: 2026-04-29T18:54:59.530

Link: CVE-2026-42255

Redhat

No data.

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