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CVE-2025-41256

Description

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.

POC

Reference

- https://github.com/iterate-ch/cyberduck/security/advisories/GHSA-688c-vjrc-84rv

- https://github.com/sbaresearch/advisories/tree/public/2025/SBA-ADV-20250325-02_Cyberduck_Mountain_Duck_Weak_Hash

Github

- https://github.com/fkie-cad/nvd-json-data-feeds