LeapFTP < 3.1.x Stack Buffer Overflow
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2010-20049
- 2026-10-03 Alias added: GHSA-fh65-c5x2-5936
References
Exploit 3
More LeapWare vulnerabilities
- TI-2003-00526 Buffer overflow in LeapFTP 2.7.3.600 allows remote FTP servers to execute arbitrary code… CVSS 2.0HIGH 7.5
- TI-2005-02628 Buffer overflow in LeapFTP allows remote attackers to execute arbitrary code via a long… CVSS 2.0HIGH 7.5
Sources
- CVE-2010-20049 · CVE Program
- CVE-2010-20049 · NVD
- FIRST EPSS
- GHSA-fh65-c5x2-5936 · GitHub Advisory Database · CC BY 4.0
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