CVE-2025-41255 - CVE House
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Status published High CVE-2025-41255

Cyberduck and Mountain Duck - Improper Certificate Store Handling

Vulnerability Description

Cyberduck and Mountain Duck improperly handle TLS certificate pinning for untrusted certificates (e.g., self-signed), unnecessarily installing it to the Windows Certificate Store of the current user without any restrictions. This issue affects Cyberduck through 9.1.6 and 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-2025-41256
Cyberduck and Mountain Duck - Weak Hash Algorithm for Certificate Fingerprint
High 7.4

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:R/S:C/C:H/I:H/A:N

Weaknesses (CWE)

CWE-266

MITRE ATT&CK TTPs

T1078 Valid Accounts
Persistence
T1098 Account Manipulation
Privilege Escalation
T1548 Abuse Elevation Control Mechanism
Privilege Escalation
T1484 Domain or Tenant Policy Modification
Defense Evasion
T1021 Remote Services
Lateral Movement