Disclosure summary
WinSCP before 5.17.10 allows remote attackers to execute arbitrary programs when the URL handler encounters a crafted URL that loads session settings. (For example, this is exploitable in a default installation in which WinSCP is the handler for sftp:// URLs.)
Source-reported weakness categories
NVD-CWE-Other
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
NIST National Vulnerability Database · NVD-CVE-2021-3331
Open original source · Updated Oct 08, 2026
Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.
| Vendor | Product / association | Version / bounds |
|---|---|---|
| winscp | winscp | * {"versionEndExcluding":"5.17.10"} |
Original records & references
- NIST NVD record
- CVE Program record
- github.com — Patch, Third Party Advisory
- winscp.net — Release Notes, Vendor Advisory
- winscp.net — Vendor Advisory
- winscp.net — Patch, Vendor Advisory
- github.com — Patch, Third Party Advisory
- winscp.net — Release Notes, Vendor Advisory
- winscp.net — Vendor Advisory
- winscp.net — Patch, Vendor Advisory
PUBLISHED 2021-01-27T16:15:16-05:00
MODIFIED 2026-10-08T17:17:39-04:00
INGESTED 2026-10-10T20:50:19-04:00