CVE-2010-20049

CRITICAL EPSS 50.1%
Published Aug 20, 202510mo ago · Modified Jun 16, 20262w ago
9.3 CVSS 4.0
Critical
Find Similar
Published Aug 20, 2025 10mo ago
Last Modified Jun 16, 2026 2w ago

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.

CVSS Details

Base Score
9.3
Exploitability
—
Impact
—
Vector string
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
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
50.1% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-121

References 5

  • raw.githubusercontent.com https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/ftp/leapftp_list_reply.rb
  • web.archive.org https://web.archive.org/web/20111013232627/http://www.leapware.com/
  • web.archive.org https://web.archive.org/web/20111016194057/https://www.corelan.be/index.php/2010/10/12/death-of-an-ftp-client/
  • exploit-db.com https://www.exploit-db.com/exploits/16704
  • vulncheck.com https://www.vulncheck.com/advisories/leapftp-stack-buffer-overflow

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.