# CVE-2025-41256

## Summary

- **CVE ID:** CVE-2025-41256
- **Severity:** HIGH
- **CVSS Score:** 7.4 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N)
- **CWE:** CWE-328
- **Published:** Jun 25, 2025
- **Last Modified:** Mar 12, 2026

## 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.

## Affected Products

- iterate GmbH — Cyberduck (0)
- iterate GmbH — Mountain Duck (0)

## References

- [CNA](https://github.com/sbaresearch/advisories/tree/public/2025/SBA-ADV-20250325-02_Cyberduck_Mountain_Duck_Weak_Hash)
- [CNA](https://github.com/iterate-ch/cyberduck/security/advisories/GHSA-688c-vjrc-84rv)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.11%
- **EPSS Percentile:** 1.7

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._