High (8.0). EPSS 0.2% chance of exploitation in the next 30 days.
Cyberduck and Mountain Duck improperly handle TLS certificate pinning for untrusted certificates (e.g., self-signed), unnecessarily installing it to the Windows Certificate Store of the current user without any restrictions.
This issue affects Cyberduck through 9.1.6 and Mountain Duck through 4.17.5.
Severity
CVSS 3.1
8.0 high
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N
EPSS
0.2% chance of exploitation in the next 30 days; higher than 8% of CVEs (scores of 2026-10-31)