CVE-2025-41256

Cyberduck and Mountain Duck - Weak Hash Algorithm for Certificate Fingerprint

Published Jun 25, 2025 CVSS 3.1 · 7.4 High EPSS < 1% KEV · Not listed
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.

Analysis

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Remediation

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Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-19095 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.
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Cyberduck and Mountain Duck - Weak Hash Algorithm for Certificate Fingerprint
Weaknesses CWE-328
References
Metrics cvssV3_1

{'score': 7.4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N'}

Subscriptions

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Weaknesses

Sources

Status
PUBLISHED
Assigner
sba-research
Published
Updated
Jun 25, 2025, 1:34 PM
Reserved
Apr 16, 2025, 9:37 AM
Status
Deferred
Published
Jun 25, 2025, 10:15 AM
Modified
Jun 17, 2026, 9:22 AM