WinSCP before 5.5.3, when FTP with TLS is used, does not verify that the server hostname…
Priority LOW 27CWE-20Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Medium
- Impact type
- —
- Confidentiality · integrity · availability
- Partial · Partial · None
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
WinSCP before 5.5.3, when FTP with TLS is used, does not verify that the server hostname matches a domain name in the subject's Common Name (CN) or subjectAltName field of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL servers via an arbitrary valid certificate.
Why it matters now
EPSS 0.00793 56th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2014-2735
- 2026-10-03 Alias added: GHSA-wx8f-7wmv-f3cq
More Winscp vulnerabilities
- TI-2002-01283 Multiple SSH2 servers and clients do not properly handle large packets or large fields… CVSS 2.0HIGH 10.0
- TI-2023-26623 The SSH transport protocol with certain OpenSSH extensions, found in OpenSSH before 9.6… CVSS 3.1MEDIUM 5.9
- TI-2019-04326 In OpenSSH 7.9, due to accepting and displaying arbitrary stderr output from the server… CVSS 3.1MEDIUM 6.8
- TI-2019-04327 An issue was discovered in OpenSSH 7.9. CVSS 3.1MEDIUM 5.9
- TI-2021-02333 WinSCP before 5.17.10 allows remote attackers to execute arbitrary programs when the URL… CVSS 3.1CRITICAL 9.8
- TI-2002-01281 Multiple SSH2 servers and clients do not properly handle packets or data elements with… CVSS 2.0HIGH 10.0
Sources
- CVE-2014-2735 · CVE Program
- CVE-2014-2735 · NVD
- FIRST EPSS
- GHSA-wx8f-7wmv-f3cq · GitHub Advisory Database · CC BY 4.0
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