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CVE-2021-3331: winscp before 5.17.10 (exclusive); +1 more affected products
CVE-2021-3331. CVSS 3.1 base score 9.8 (CRITICAL, NVD). EPSS 0.07611 (percentile 0.94408), scored 2026-10-08.
Affected technology
winscp · before 5.17.10 (exclusive)
winscp
n/a · n/a
Vendor not specified by the source
Description’s affected range: before 5.17.10
Component: Not specified by the source
Attack conditions (NVD, CVSS 3.1): Network (remote) · No privileges required · No user interaction required
What an attacker can do
Remote attackers can 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.). NVD’s CVSS 3.1 assessment (base score 9.8/10) rates confidentiality, integrity and availability impact as high.
- CCR priority
- 41.1 /100 (P3)
- CVSS 3.1
- 9.8 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H · NVD
- EPSS
- 0.07611 · percentile 0.94408 · 2026-10-08
- KEV
- no
Provenance
- GitHub Advisory Database · Source record · observed 2026-10-09 03:17:07.463462+00:00 UTC
- NVD CVE API 2.0 · Source record · observed 2026-10-09 03:13:32.966430+00:00 UTC
Stable permalink: https://cybercodered.org/item/cve-cve-2021-3331.html