# CVE-2010-20034

## Summary

- **CVE ID:** CVE-2010-20034
- **Severity:** HIGH
- **CVSS Score:** 8.5 (CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-121
- **Published:** Aug 21, 2025
- **Last Modified:** May 15, 2026

## Description

Gekko Manager FTP Client <= 0.77 contains a stack-based buffer overflow in its FTP directory listing parser. When processing a server response to a LIST command, the client fails to properly validate the length of filenames. A crafted response containing an overly long filename can overwrite the Structured Exception Handler (SEH), potentially allowing remote code execution.

## Affected Products

- New Software S.C. — Gekko Manager FTP Client (*)
- New Software S.C. — Gekko Manager FTP Client (0)

## References

- [CNA](https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/ftp/gekkomgr_list_reply.rb)
- [CNA](https://www.exploit-db.com/exploits/16728)
- [CNA](https://www.gekkomanager.com/)
- [CNA](https://web.archive.org/web/20111016194057/https://www.corelan.be/index.php/2010/10/12/death-of-an-ftp-client/)
- [CNA](https://www.vulncheck.com/advisories/gekko-manager-ftp-client-stack-buffer-overflow)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 19.96%
- **EPSS Percentile:** 95.3

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._