CVE-2010-20049

CRITICAL

LeapFTP <3.1.x - Buffer Overflow

Title source: llm

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.

Exploits (2)

exploitdb WORKING POC VERIFIED
by Metasploit · rubyremotewindows
https://www.exploit-db.com/exploits/16704
metasploit WORKING POC GOOD
rubypocwin
https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/ftp/leapftp_list_reply.rb

Scores

CVSS v4 9.3
EPSS 0.5013
EPSS Percentile 97.8%
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

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact total

Details

CWE
CWE-121
Status published
Products (2)
LeapWare/LeapFTP < 3.1.*
LeapWare/LeapFTP < 3.1.x
Published Aug 20, 2025
Tracked Since Feb 18, 2026