Is CVE-2021-3331 actively exploited?

CVE-2021-3331 has no public evidence of in-the-wild exploitation as of 2024-11-21.

What is the CVSS score for CVE-2021-3331?

CVE-2021-3331 has a CVSS score of 9.8 (CRITICAL severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

How do I patch CVE-2021-3331?

Patch guidance is available from winscp security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2021-3331.

Fix CVE-2021-3331 - CRITICAL 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.)

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
Weaknesses: NVD-CWE-Other

Metadata

Primary Vendor: WINSCP
Published: 1/27/2021
Last Modified: 11/21/2024
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

winscp : winscp

Remediation Guidance

Executive Summary

Cite this page

CVE-2021-3331. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2021-3331

View on NIST NVD

CVE-2021-3331 vulnerability