CVE-2026-42255: Technitium Dnsserver

Medium severity, CVSS 6.5. EPSS: 0.4% chance of exploitation in the next 30 days.

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

Affected products

• Technitium Dnsserver: before 15.0 (fixed in 15.0)

Published 2026-04-26. Last modified 2026-06-17.