CVE•Published 2021-01-27•Modified 2026-10-08•1 article on news•6 live references•NVD data
CVE-2021-3331Winscp · Winscp
Vulnerability data via NVD (ingested)
CVSS v3.1
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
94
Exploit Prediction Scoring System · top 6% of all CVEs
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.)
Timeline
Published 2021-01-27
Modified 2026-10-08
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2021-3331Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Winscp Winscp"All exposed Winscp Winscp instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Winscp"HTTP body or banner mentions "Winscp" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2021-3331Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2021-3331Censys host search filtered to this CVE id.
grep.app
CVE-2021-3331Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2021-3331GitHub code search for direct mentions.
Google dork
"CVE-2021-3331" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.