CVE-2024-56946: Technitium Dnsserver

Medium severity, CVSS 5.3. EPSS: 0.4% chance of exploitation in the next 30 days.

Denial of service in DNS-over-QUIC in Technitium DNS Server <= v13.2.2 allows remote attackers to permanently stop the server from accepting new DNS-over-QUIC connections by triggering unhandled exceptions in listener threads.

Affected products

• Technitium Dnsserver: before 13.3 (fixed in 13.3)

Published 2025-02-03. Last modified 2026-06-17.