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Cyberduck CyberduckCyberduck and Mountain Duck - Improper Certificate Store Handling

Risk 58
Severity
8
AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N

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.

First published (updated )
CVE-2025-41255

Cyberduck CyberduckCyberduck and Mountain Duck - Weak Hash Algorithm for Certificate Fingerprint

Risk 56
Severity
7.4
AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Cyberduck and Mountain Duck improper handle TLS certificate pinning for untrusted certificates (e.g., self-signed), since the certificate fingerprint is stored as SHA-1, although SHA-1 is considered weak.

This issue affects Cyberduck: through 9.1.6; Mountain Duck: through 4.17.5.

First published (updated )
CVE-2025-41256

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SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
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