CVE-2025-41256 - CVE House
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Status published High CVE-2025-41256

Cyberduck and Mountain Duck - Weak Hash Algorithm for Certificate Fingerprint

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Thomas Kostal
  • Andreas Boll

References

More from iterate GmbH

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CVE-2025-41255
Cyberduck and Mountain Duck - Improper Certificate Store Handling
High 8

Affected Vendor

iterate GmbH

View all reports →

Affected Software

Cyberduck, Mountain Duck
Vulnerable Versions:
0

Timeline

Official Publish: June 25th, 2025
Last Modified: June 25th, 2025
Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Weaknesses (CWE)

CWE-328

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.