WinSCP vulnerabilities: known CVEs & security history
WinSCP · File transfer · 17 tracked CVEs · 0 actively exploited · updated June 2026 · what is a CVE? →
This is the full list of known vulnerabilities (CVEs) across all WinSCP release lines — 17 in total. A CVE here doesn't mean your version is affected — check WinSCP's current status and the safe version to run.
Known WinSCP CVEs
Actively-exploited and most-severe first. Open any CVE for full details.
| CVE | Severity | CVSS | EPSS | Year |
|---|---|---|---|---|
| CVE-2021-3331 | critical | 9.8 | 7% | 2021 |
| CVE-2020-28864 | critical | 9.8 | 3% | 2020 |
| CVE-2002-1357 | high | 10 | 10% | 2002 |
| CVE-2002-1358 | high | 10 | 6% | 2002 |
| CVE-2002-1359 | high | 10 | 80% | 2002 |
| CVE-2002-1360 | high | 10 | 6% | 2002 |
| CVE-2007-4909 | high | 9.3 | 4% | 2007 |
| CVE-2018-20684 | high | 7.5 | 3% | 2019 |
| CVE-2006-3015 | high | 7.1 | 6% | 2006 |
| CVE-2019-6110 | medium | 6.8 | 21% | 2019 |
| CVE-2019-6109 | medium | 6.8 | 4% | 2019 |
| CVE-2013-4852 | medium | 6.8 | 3% | 2013 |
| CVE-2024-31497 | medium | 5.9 | 6% | 2024 |
| CVE-2023-48795 | medium | 5.9 | 93% | 2023 |
| CVE-2019-6111 | medium | 5.9 | 58% | 2019 |
| CVE-2014-2735 | medium | 5.8 | 1% | 2014 |
| CVE-2018-20685 | medium | 5.3 | 4% | 2019 |
Is my WinSCP version affected?
The list above spans every release. To know whether your version is affected — and the minimum safe version to upgrade to — check it directly.
Check your WinSCP version → · Monitor WinSCP for new CVEs →
WinSCP vulnerabilities — frequently asked
How many known vulnerabilities does WinSCP have?
IsItPatched tracks 17 CVEs for WinSCP. 2 are critical-severity and 7 high-severity. These span every release line — what matters is whether the version you run is affected.
Does WinSCP have any actively-exploited vulnerabilities?
None of WinSCP's tracked CVEs are currently in CISA's KEV catalog — but new ones can be added at any time, so keep your version current.
What is the most severe WinSCP vulnerability?
Among tracked issues, CVE-2021-3331 (CRITICAL, CVSS 9.8) ranks highest.
Is WinSCP safe to use?
It depends on the version. The latest supported WinSCP release clears the known issues; older versions may still be affected. Check the exact version you run for a verdict.
CVE data aggregated from NVD, CISA KEV and EPSS (FIRST.org). Related: WinSCP security status · WinSCP end-of-life · actively-exploited CVEs. Always verify against WinSCP's advisories — see our disclaimer.