CVE-2026-45557: Technitium DNS Server

Medium severity, CVSS 5.8. EPSS: 0.5% chance of exploitation in the next 30 days.

Technitium DNS Server aggressively tries to fetch missing RRSIG records or mismatched DNSKEY records. An attacker in control of a domain can cause a vulnerable system to generate excessive network traffic. Fixed in 15.0.

Affected products

• Technitium DNS Server: before 15.0 (fixed in 15.0)

Published 2026-05-19. Last modified 2026-07-24.