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HIGH · 7.2

CVE-2026-42255

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

Vulnerability Description

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

CVSS Score

7.2

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:L
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
NONE
Integrity
LOW
Availability
LOW

Affected Products

VendorProductVersions
TechnitiumDnsserver< 15.0

Related Weaknesses (CWE)

CWE-684

References

FAQ

What is CVE-2026-42255?

CVE-2026-42255 is a vulnerability with a CVSS score of 7.2 (HIGH). Technitium DNS Server before 15.0 allows DNS traffic amplification via cyclic name server delegation.

How severe is CVE-2026-42255?

CVE-2026-42255 has been rated HIGH with a CVSS base score of 7.2/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-42255?

Check the references section above for vendor advisories and patch information. Affected products include: Technitium Dnsserver.