An issue has been found in PowerDNS Recursor versions 4.1.x before 4.1.9 where records in the answer section of responses received from authoritative servers with the AA flag not set were not properly validated, allowing an attacker to bypass DNSSEC validation.
Exploitability
AV:NAC:HPR:LUI:RScope
S:UImpact
C:LI:LA:N3.7/CVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:NOther