Critical (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.
Severity
CVSS 3.1
9.1 critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
EPSS
0.6% chance of exploitation in the next 30 days; higher than 51% of CVEs (scores of 2026-10-31)