CVE-2024-40457: No-IP Duc

Critical severity, CVSS 9.1. EPSS: 0.6% chance of exploitation in the next 30 days.

No-IP Dynamic Update Client (DUC) v3.x uses cleartext credentials that may occur on a command line or in a file. NOTE: the vendor's position is that cleartext in /etc/default/noip-duc is recommended and is the intentional behavior.

Affected products

• No-IP Duc: from 3, before 4 (fixed in 4)

Published 2024-09-12. Last modified 2026-06-17.