Critical severity9.8NVD Advisory· Published Jan 27, 2021· Updated Jun 17, 2026

CVE-2021-3331

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.)

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Winscp/Winscp3 versions
cpe:2.3:a:winscp:winscp:*:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:a:winscp:winscp:*:*:*:*:*:*:*:*range: <5.17.10
- (no CPE)
- (no CPE)range: <5.17.10

Patches

Vulnerability mechanics

References

github.com/winscp/winscp/commit/faa96e8144e6925a380f94a97aa382c9427f688dnvdPatchThird Party Advisory
winscp.net/tracker/1943nvdPatchVendor Advisory
winscp.net/eng/docs/historynvdRelease NotesVendor Advisory
winscp.net/eng/docs/rawsettingsnvdVendor Advisory

News mentions

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cvss	0.637
epss	0.006
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000