CVE-2021-36754: Powerdns Authoritative Server

High severity, CVSS 7.5. EPSS: 64.9% chance of exploitation in the next 30 days.

PowerDNS Authoritative Server 4.5.0 before 4.5.1 allows anybody to crash the process by sending a specific query (QTYPE 65535) that causes an out-of-bounds exception.

Affected products

• Powerdns Authoritative Server: from 4.5.0, before 4.5.1 (fixed in 4.5.1)

Published 2021-07-30. Last modified 2026-06-17.