High severity7.4OSV Advisory· Published Jun 25, 2025· Updated Jun 17, 2026

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Iterate Ch/CyberduckOSV2 versions
$TAG_NAME, release-3-3, release-3-3-1, …+ 1 more
- (no CPE)range: $TAG_NAME, release-3-3, release-3-3-1, …
- (no CPE)range: <=9.1.6
Mountain Duck/Mountain Duckllm-create
Range: <=4.17.5

Patches

Vulnerability mechanics

References

github.com/iterate-ch/cyberduck/security/advisories/GHSA-688c-vjrc-84rvnvd
github.com/sbaresearch/advisories/tree/public/2025/SBA-ADV-20250325-02_Cyberduck_Mountain_Duck_Weak_Hashnvd

News mentions

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