Lotus Domino SMTP server 4.63 through 5.08 allows remote attackers to cause a denial of service (CPU consumption) by forging an email message with the sender as bounce@[127.0.0.1] (localhost), which causes Domino to enter a mail loop.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.009
EPSS Ranking 74.6%