CVE-2026-42255 Details
Description
Technitium DNS Server before 15.0 allows DNS traffic amplification via cyclic name server delegation.
A vulnerability in Technitium DNS Server versions prior to 15.0 allows for DNS traffic amplification attacks through cyclic name server delegation. This issue can be exploited by creating a loop in DNS delegation, causing an increase in response traffic.
Users can upgrade to Technitium DNS Server version 15.0 or later, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Apr 27, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/TechnitiumSoftware/DnsServer/blob/master/CHANGELOG.md#technitium-dns-server-change-log | [email protected] | Release Notes |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-684 | Incorrect Provision of Specified Functionality | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| technitium dnsserver | < 15.0 |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 29, 2026 | Initial Analysis | [email protected] |
| Apr 26, 2026 | New CVE Received | [email protected] |