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TI-2021-02333 Aliases CVE-2021-3331GHSA-rx6x-hw9j-xhm3

WinSCP before 5.17.10 allows remote attackers to execute arbitrary programs when the URL…

Priority MEDIUM 59Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

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.)

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.07703 94th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:winscp:winscp:*:*:*:*:*:*:*:*before 5.17.10VulnerableWinscp
  • cpe:2.3:a:winscp:winscp:*:*:*:*:*:*:*:* Versions before 5.17.10 Vulnerable ·Winscp

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-3331
  2. 2026-10-03 Alias added: GHSA-rx6x-hw9j-xhm3
  3. 2026-10-08 CISA SSVC decision points changed

References

Patch 2

Advisory 2

  • 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-2002-01281 Multiple SSH2 servers and clients do not properly handle packets or data elements with… CVSS 2.0HIGH 10.0
  • TI-2002-01284 Multiple SSH2 servers and clients do not properly handle strings with null characters in… CVSS 2.0HIGH 10.0
See all 16 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences