LeapFTP < 3.1.x Stack Buffer Overflow
Published Aug 20, 2025
9.3
CRITICALCVSS 4.0
EPSS 0.80%
Description
LeapFTP < 3.1.x contains a stack-based buffer overflow vulnerability in its FTP client parser. When the client receives a directory listing containing a filename longer than 528 bytes, the application fails to properly bound-check the input and overwrites the Structured Exception Handler (SEH) chain. This allows an attacker operating a malicious FTP server to execute arbitrary code on the victim’s machine when the file is listed or downloaded.
Affected products
-
- Version 0StatusaffectedConstraints<3.1.*
- Version
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
1 other source (NVD) ▾
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
PoCAutomatable
YesTechnical Impact
TotalDecision
n/aAssessed Aug 22, 2025 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2025–2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (7 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.80% (0.00797) | 54.87th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.74% (0.00743) | 49.72th | v5 (v2026.06.15) |
| May 6, 2026 | 54.24% (0.54242) | 98.03th | v4 (v2025.03.14) |
| Jan 16, 2026 | 50.96% (0.50959) | 97.77th | v4 (v2025.03.14) |
| Dec 20, 2025 | 59.77% (0.59770) | 98.17th | v4 (v2025.03.14) |
| Oct 8, 2025 | 53.75% (0.53746) | 97.85th | v4 (v2025.03.14) |
| Aug 21, 2025 | 0.07% (0.00072) | 22.44th | v4 (v2025.03.14) |
References (5)
- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/ftp/leapftp_list_reply.rb exploit
- https://web.archive.org/web/20111013232627/http://www.leapware.com/ vendor-advisorypatch
- https://web.archive.org/web/20111016194057/https://www.corelan.be/index.php/2010/10/12/death-of-an-ftp-client/ technical-descriptionexploit
- https://www.exploit-db.com/exploits/16704 exploit
- https://www.vulncheck.com/advisories/leapftp-stack-buffer-overflow third-party-advisory
| Link | Providers | Tags |
|---|---|---|
| https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/ftp/leapftp_list_reply.rb | exploit | |
| https://web.archive.org/web/20111013232627/http://www.leapware.com/ | vendor-advisorypatch | |
| https://web.archive.org/web/20111016194057/https://www.corelan.be/index.php/2010/10/12/death-of-an-ftp-client/ | technical-descriptionexploit | |
| https://www.exploit-db.com/exploits/16704 | exploit | |
| https://www.vulncheck.com/advisories/leapftp-stack-buffer-overflow | third-party-advisory |
Change history (0)
No recorded changes yet.