Vulnerability in Iterate Gmbh Cyberduck
CVE-2025-41256
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.001 (2.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 2nd percentile — 2.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: +0.000
Affected products
- Iterate Gmbh Cyberduck — versions 0
- Iterate Gmbh Mountain Duck — versions 0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- 1e3a9e0f-5156-4bf8-b8a3-cc311bfc0f4a (third-party-advisory)
- 1e3a9e0f-5156-4bf8-b8a3-cc311bfc0f4a (vendor-advisory)
Frequently asked questions
- What is CVE-2025-41256?
- CVE-2025-41256 is a high-severity vulnerability in Iterate Gmbh Cyberduck, classified under Use of Weak Hash. CVSS score: 7.4/10. Published 2025-06-25.
- How severe is CVE-2025-41256?
- High severity. CVSS v3 base score is 7.4 out of 10.
- Is CVE-2025-41256 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.