CVE-2021-3331

9.8 CRITICAL

WinSCP before 5.17.10 allows remote attackers to execute arbitrary programs when the URL handler encounters a crafted URL that loads sess...

Published: 2021-01-27 · Last updated: 2026-06-17

Severity and scoring

CVSS: 9.8 CRITICAL
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Vendor	Product
winscp	winscp

Description

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: NVD

References

[NVD]https://nvd.nist.gov/vuln/detail/CVE-2021-3331
[Patch]https://github.com/winscp/winscp/commit/faa96e8144e6925a380f94a97aa382c9427f688d
[Vendor advisory]https://winscp.net/eng/docs/history#5.17.10
[Vendor advisory]https://winscp.net/eng/docs/rawsettings
[Patch]https://winscp.net/tracker/1943
[Patch]https://github.com/winscp/winscp/commit/faa96e8144e6925a380f94a97aa382c9427f688d
[Vendor advisory]https://winscp.net/eng/docs/history#5.17.10
[Vendor advisory]https://winscp.net/eng/docs/rawsettings
[Patch]https://winscp.net/tracker/1943

Related CVEs

Same vendor

CVE-2019-6109 — An issue was discovered in OpenSSH 7.9 (6.8 MEDIUM)